Read the excerpt.

political activism barely exists at my high school. during election years, there might be a few kids who wear t-shirts in support of their candidate, but that is it. this fall i turned eighteen, and the lack of interest really began to frustrate me. there was not a young democrats nor a young republicans group among the countless after-school organizations. i believed that i could generate student interest in politics with a little marketing, so i made ten posters advertising the mysterious young radicals club.

the excerpt is from a memoir because

it is an objective report of facts.
it contains third-person narration.
the writer reveals personal thoughts.
the writer creates fictional characters.

the writer reveals personal thoughts

A memoir is first-person narration of a particular time of the writer's life. The writer describes the time period using first person words. In our case, the writer is narrating the thoughts they had of the election years while he was in high-school. Since the narration is completely personal and contain emotions and opinions, we can rule out choice 1. Since they is narrating the events from their point of view (first person), we can rule out choice 2 as well. Also, there are no fictional characters. Since they is remembering the events of their life, all the characters are real people; therefore we can rule out choice 4.

We can conclude that this is a memoir because the writer reveals personal thoughts.

d) the narrator even suggested that the white whale, moby d, was ubiquitous and present in every ocean at every moment.