Answer:
A, B, C, and D are all correct.
Explanation:
For #2, he reacted that way because it's his view and he says "after all the stuff she said about you?"
Answer:
It's important to stand up for injustice because everyone deserves to be treated equally. If you don't stand up for injustice, then there is a possibly no one will. You could inspire and help multiple people, as well as bring justice to those wronged. It also helps us (as humans) learn from our mistakes.
Explanation: