**Reasoning**

| Entity | Suitability category | Key credit metrics (2022‑2023) | Hybrid‑related factors | Priority rationale |
|--------|----------------------|------------------------------|------------------------|--------------------|
| **A – REDEIA** | **Strongly Suitable** – regulated transmission utility with highly visible cash flows. | Net debt ≈ 5.4 bn; Net debt/EBITDA ≈ 3.6×; FFO/Net debt ≈ 29%; Equity ≈ 4.9 bn. | No existing hybrid in the data; no imminent hybrid call. | Stable, investment‑grade profile with moderate leverage. Hybrid issuance would be opportunistic (leverage improvement) rather than urgent. |
| **B – EDF** | **Marginally Suitable** – large, partially regulated integrated utility; cash‑flow visibility moderate. | Net debt ≈ 132 bn; Net debt/EBITDA ≈ 22×; Operating cash flow negative (‑7.4 bn); Equity fell from 62 bn to 46 bn. | Has perpetual subordinated bonds (hybrid) with 606 € m coupon and net redemption of 1 bn; refinancing need exists. | Credit metrics are deteriorating and a rating downgrade risk is present; hybrid could improve leverage, but the cost of hybrid is likely high relative to average debt cost and the issuer is less “regulated‑only”. |
| **C – TERNA** | **Strongly Suitable** – regulated TSO with high cash‑flow visibility. | Net debt ≈ 8.6 bn; Net debt/EBITDA ≈ 4.2×; FFO/Net debt ≈ 27%; Equity ≈ 6.2 bn. | Existing perpetual hybrid bond of 989 € m; coupon payments recorded; likely a call within the next 18 months. | Regulated status, stable credit, and the presence of an existing hybrid that requires refinancing make this issuer the most urgent and attractive candidate for a new hybrid transaction. |

**Priority order**

1. **C – Terna** – strong regulated utility with an existing hybrid that is approaching a call date; issuance would materially improve leverage and rating headroom, and the cost of hybrid is expected to be competitive.  
2. **A – REDEIA** – strong regulated profile but no imminent hybrid refinancing need; a hybrid would be opportunistic rather than urgent.  
3. **B – EDF** – marginally suitable, highly leveraged with deteriorating metrics, but the higher risk and cost of a hybrid make it the least immediate opportunity.

**Final answer**

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