Correct option is D
No improvement is needed as "would have missed" is correctly used.
Explanation: The phrase "would have missed" correctly uses the conditional perfect tense to express an action that could have happened in the past under different circumstances. It accurately conveys the hypothetical nature of the situation.
Grammatical rule used: The conditional perfect tense is used to discuss hypothetical scenarios in the past.
Example: She would have missed the flight if she hadn't left early.