Which poem?
You need to include more of your question or the part of the poem that talks of this part!
Answer:
A. Often helps you realize that you are not alone, and builds a community of people who understand
Explanation:
According to the text, talking to other people or groups of people about your experiences with impostorism helps a person recognize that such feelings are not peculiar to them and it would help the person build a community of people who understand.
Impostorism is a term in psychology that describes feelings of doubt a person has about his talents and abilities. Such a person usually feels he is a fake.