Merry moon Mary ,mayflies
It is a metaphor because the sentence is comparing two different things without using the word "as" or "like".
It's B. The other answers have the pronouns in the Nominative case.
Answer:
Last week, we met several fascinating people at the conference.
Once upon a time, there was a beautiful princess who had lived in a castle.
I've owned this answer phone for three years.
They haven't sold all the tickets to the Cup Final.
Explanation: