Introduction:
In this question, we need to choose the correct verb tense to complete the sentence. The sentence is "she…her uncle yesterday." We have four options: a) visits, b) will visit, c) visited, d) is going to visit. Let's analyze each option and choose the correct one.

Options:

a) Visits: This is the present tense form of the verb "visit." It is used to describe actions that happen regularly or repeatedly. However, the sentence mentions that the action happened yesterday, so this option is not correct.

b) Will visit: This is the future tense form of the verb "visit." It is used to describe actions that will happen in the future. However, the sentence mentions that the action happened yesterday, so this option is not correct either.

c) Visited: This is the past tense form of the verb "visit." It is used to describe actions that have already happened. Since the sentence mentions that the action happened yesterday, this option is the correct answer.

d) Is going to visit: This is the future continuous tense form of the verb "visit." It is used to describe actions that will happen in the future. However, the sentence mentions that the action happened yesterday, so this option is not correct.

Conclusion:
Therefore, the correct option is c) visited. This verb tense accurately describes the action that happened in the past, as mentioned in the sentence.