How is a topic different from a theme?

a: it must take place in a larger literary conversation.
b: it is written in a full paragraph form, with citations.
c: it states a life lesson, while the theme does not.
d: it does not state a life lesson, whereas a theme does.

i think it's c or d but i'm not sure.

What is the most significant effect of waverly's two names? a. they allow her to be able to tell whether an american or chinese friend is calling her name based on which one she uses. b. they allow her to switch her identities like a double agent when she switches names. c. they distinguish between her two cultures and cause her to feel conflicted at times between her american and chinese selves. d. they distinguish between her family name and her official government papers name.