**Reasoning**

When evaluating which issuer to approach first for a hybrid‑bond origination, a bank will look for a combination of solid credit quality, stable cash‑flow generation, manageable leverage, and a clear investor appetite for hybrid capital.  

- **Veolia Environnement (C)** shows strong revenue growth (≈ 50 % YoY), improving operating profit (€ 2.2 bn in 2022), and a rising dividend (€ 1 per share). Its leverage is moderate (debt/equity ≈ 1.8) and operating cash flows are comfortably positive (≈ € 4.1 bn). These characteristics make Veolia a high‑quality, investment‑grade candidate with a good capacity to issue a hybrid bond at attractive pricing.  

- **EDP, S.A. (A)** is a regulated utility with solid, growing revenue (+ 37 % YoY), positive net profit (≈ € 1.2 bn) and cash flow from operations (≈ € 3.8 bn). Leverage is similar to Veolia’s, and the company already pays a dividend (€ 0.19 per share). While slightly less dynamic than Veolia, EDP is still a reliable issuer for a hybrid transaction.  

- **Électricité de France (B)** is by far the largest in terms of revenue, but its 2022 results show a deep operating loss (≈ € ‑19 bn), negative operating cash flow (‑€ 7.4 bn), sharply declining equity, and very high leverage. These financial distress indicators make it a much riskier prospect for a hybrid‑bond issuance, especially for a bank seeking a clean, investment‑grade transaction.  

Therefore, the most promising prospects are Veolia first, followed by EDP, and EDF last.

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