The correct answer is C. had.
The sentence is in the past subjunctive mood, which is used to talk about hypothetical situations or things that are not true. The past subjunctive is formed with the past tense of the verb “to be” (were) or the past participle of the verb (had).
In this sentence, the speaker is talking about a situation that is not true. The speaker is saying that if they had a lot of money, they would not work anymore. In this case, the past subjunctive is used because the speaker is talking about something that is not real or possible.
The other options are incorrect because they are not in the past subjunctive mood. Option A, were, is in the past indicative mood. Option B, have, is in the present tense. Option D, has, is in the present perfect tense.
Here are some more examples of the past subjunctive:
- If I were rich, I would buy a house.
- If I had known, I would have told you.
- I wish I were taller.
- I wish I had gone to the party.