To determine the suitability of each entity for the issuance of hybrid bonds, we must evaluate their business profile, credit metrics, rationale for issuance, and existing hybrid profile based on the provided KPIs and suitability definitions.

**Entity A: EDP, S.A.**
- **Business Profile:** EDP is a regulated utility (generation, transmission, distribution, and supply of electricity and gas), which falls perfectly into the "Strongly Suitable" category for hybrid issuance.
- **Credit Metrics & Refinancing Need:** EDP's Net Debt (approx. €20B long-term + €4.2B short-term - €4.9B cash = ~€19.3B) relative to its EBITDA (roughly €4.5B based on D&A and EBIT) shows elevated leverage. The finance costs doubled from €875M to €1.75B, significantly pressuring profit before tax. This deterioration in financial metrics threatens its BBB investment-grade profile. Issuing hybrids would materially improve its adjusted leverage metrics and provide crucial rating headroom. 
- **Existing Hybrids:** EDP has an established track record with deeply subordinated securities (Titres Super Subordonnés) already on its balance sheet, demonstrating high credibility and market access for this instrument. 

**Entity C: Veolia Environnement**
- **Business Profile:** Veolia operates in environmental services (water and waste), which is infrastructure-like/adjacent with moderate to high cash flow visibility, placing it in the "Marginally Suitable" to "Strongly Suitable" overlap, though typically treated as Marginally Suitable due to industrial exposure.
- **Credit Metrics & M&A Rationale:** Veolia’s Net Debt surged from ~€9.5B in 2021 to ~€24.5B in 2022 following the massive Suez acquisition. Its leverage (Net Debt / EBITDA) is stretched (EBITDA ~€5.4B implies >4.5x leverage). Hybrid issuance would be highly opportunistic but critical to temporarily support the balance sheet, avoid equity dilution, and improve adjusted leverage post-M&A. 
- **Existing Hybrids:** Veolia actively manages deeply subordinated securities (hybrids), contributing Suez's hybrid debt (€1.6B) in 2022 and redeeming €500M, showing it uses hybrids as a recurring funding instrument for M&A and credit support. 

**Entity B: Electricité de France (EDF)**
- **Business Profile:** While EDF is a regulated utility, its financial profile has severely deteriorated. It recorded a massive net loss of -€18.2B in 2022, and its operating profit was -€19.3B. Shareholders' equity dropped from €50.2B to €34.3B, heavily impacted by nuclear provisions and energy price caps.
- **Suitability Assessment:** EDF is facing existential financial distress rather than a temporary metric squeeze. Rating agencies have downgraded EDF deep into the BBB- area or sub-investment grade. While hybrids can preserve ratings for BBB issuers experiencing moderate deterioration, EDF's metrics are far too damaged for a standard hybrid to provide meaningful "rating headroom." Furthermore, issuing a hybrid would be extremely costly (marginal cost is very high compared to average debt), and institutional investors would likely be reluctant to buy subordinated bonds from an entity with such massive operating losses and negative free cash flow. Thus, despite being a utility, its current financial state renders it highly unsuitable for a standard hybrid bond origination under the given KPIs.

**Conclusion:**
EDP (A) is the prime candidate: it is a regulated utility with deteriorating metrics where a hybrid would directly rescue its BBB rating headroom, and it has upcoming refinancing needs. Veolia (C) is the second priority: its stretched metrics from the Suez acquisition make an opportunistic hybrid issuance highly accretive to adjusted leverage. EDF (B) is the least suitable: its extreme losses and severe balance sheet deterioration make a hybrid an ineffective and costly remedy for its fundamental credit issues.

<answer>A,C,B</answer>