Make a sentence from the words in brackets using the appropriate tense: The month of October is going on and you are talking about Ann’s earning of last year.____________________ (Ann / not / earn / so much / last year)

The correct answer is: C. Ann didn’t earn so much last year.

The sentence is about Ann’s earnings in the past, so we need to use the past tense. Option A is incorrect because it uses the present perfect tense, which is used to talk about actions that started in the past and continue to the present. Option B is incorrect because it uses the present tense, which is used to talk about actions that happen regularly or repeatedly. Option D is incorrect because it uses the past perfect tense, which is used to talk about actions that happened before another