Why does the author choose to alternate images of the past and present on page 81 as Vladek describes the situation with Richieu?
a. It emphasizes the anger Anja has over the idea of giving Richieu up.
b. It shows how the situation with Richieu still affects Vladek.
c. It contrasts how Richieu's life was before and after the war.
d. It demonstrates the conflict Vladek felt in the past.