“Life is a roller coaster.”

A. Metaphor
B. Simile
C. Idiom
D. Personification

metaphor

Explanation:

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.

the answer is a 100% b) communism

hope dis ya ; )