The sentence which uses an infinitive as the object of the verb is the following one:
D. In the beginning of the story, Allie goes to meet the people who will eventually help her succeed.
Explanation:
The main verb is "goes", and the object is "to meet", which provides a reason for Allie to go, so she can do a particular thing. In letter D, the action that takes place after Allie goes is meeting the people who will eventually help her succeed.
