87. The debate over bilingual education centers on the issue of whether the United States should foster the idea of single common language, an idea, some believe, that has in the past been crucial in binding diverse constituencies together.
(A) been crucial in binding diverse constituencies together
(B) been crucial as a binding together of diverse constituencies
(C) been crucial to bind together constituencies that are diverse
(D) become crucial in binding together diverse constituencies
(E) become crucial to bind together constituencies that are diverse
The answer is A
I want to discuss two topic.
1.what's different between be and become in this question?
=>In my opinion, be = become, but it seems not to work in this question.
2.What's different between "binding together diverse constituencies" and "binding diverse constituencies together".