She promised me that if she had the opportunity she would have come regardless of the weather.

1. A Option A: She promised me that if she had the opportunity she would have come regardless of the weather.
2. B Option B: She assured me that had she had the opportunity, she would have come regardless of the weather.
3. C Option C: She assured me that if she would have had the opportunity she would have come regardless of the weather.
4. D Option D: She promised me that if she had had the opportunity she would have cameirregardless of the weather.

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