How is B right? It only talks about blues music, and the passage says that African American writers have used music and musicians, not anything about blues music. This is why I eliminated this answer. Could someone give me an explanation?

I put A for my answer rather than C. Why would C strengthen the argument? What do eastern cities have to do with being a truly national black theater?

Can someone just explain why E is the correct answer?

Can someone explain this question?

I was between answers C and E. I chose C because E had the word can, which meant it may not contribute to the adverse conditions. Why is E correct then?

Why couldn't frame 2 work also?

I didn't like any of these answers. Why is A right?