The answer is Some college or associate's degree
They wanted to defend their colonies. it was justified because they wanted to protect people.
I do not know. I think you just need to go by what the other guy said.
East Africa is located by the Red Sea, which was and still is an important trade route, trade first began because of the Arab/Muslim migration from the Arabian Peninsula to East Africa(for example Ethiopia)
I have no clue what the answer is.