The correct answer is: B. going
The sentence is in the present progressive tense, which is used to describe actions that are happening right now or that are happening repeatedly or habitually. In this case, the sentence is describing an action that is happening repeatedly or habitually, as Marry goes to the bank on a regular basis.
The other options are incorrect because they are not in the present progressive tense. Option A, go, is in the simple present tense, which is used to describe actions that happen regularly or habitually. Option C, gone, is in the past participle form, which is used to form the present perfect tense and the past perfect tense. Option D, went, is in the simple past tense, which is used to describe actions that happened at a specific time in the past.
Here are some examples of how the other options could be used in a sentence:
- Marry goes to the bank on Monday.
- Marry has gone to the bank.
- Marry went to the bank yesterday.