Answer & Explanation
A) first person limited
A first person point of view is said by a character who is invoved in the events of the story and unlike third person point of views will actually use words such as 'we' or 'I'.
The Great Gatsby is told from the point of view of Nick Carroway. He is from the Midwest, but narrates the story after it takes place in the East. As such, he is an outsider, and tends to judge what he experiences in the East based on his midwestern ideas and values.
Nick makes an effort to assure the reader that he is nonjudgmental and completely honest. This is ironic, because he is very judgmental and opinionated.