Why was Ruby Bridges respectful?

Which can writers improve their writing

Which choice is a major detail from paragraph two? a) the great wall is a large network of several walls and towers. b) the great wall looks like a long wall snaking its way across china. c) the great wall was constructed over hundreds of years beginning in 221 b.c. d) the great wall construction encouraged several independent kingdoms to unite.

How does hughes’ poem, “let america be america again,” represent the idea of the failure of the american dream?