Answer is C) that people should not simple stand by and let injustice occur.
The question suggests that there are a number of possible answers to choose from. You haven't shown those, but I would take a wild guess and say, possibly, being bullied as a child?
Answer:
Its neither.
Explanation:
A metaphor is used in a sentence without like or as
ex: Laughter is the best medicine.
Laughter isn't medicine but we used it in a sentence without like or as
A simile is used in a sentence with like or as.
ex: She floated like a cloud.
She isnt a cloud but she acted like one.
Hope this somewhat helped