Answer:
B.“…I had begun to see adults for the first time.”
Step-by-step explanation:
This is the passage that illustrates the fact that "Farewell to Manzanar" is a "coming of age" story. A "coming of age" story is a story that details the transition from childhood to adulthood of a person. This generally entails some loss of innocence, gain of maturity, existential questions or increased independence. In this sentence, we learn that the speaker is now able to see adults differently for the first time. This shows that the speaker has developed a different, more mature perspective.