controversy over books and films used in schools has caused school boards to consider (should they g

题目

controversy over books and films used in schools has caused school boards to consider (should they get involved/ Whether they should get involved) in selection procedures for such materials.
括号里两个句子哪个可以,为什么另一个不可以啊?
Whether they should get involved
Whether they should get involved
Whether they should get involved
Whether they should get involved
Whether they should get involved
Whether they should get involved
Whether they should get involved

答案

选后者.whether they should get involvedcontroversy over books and films used in schools has caused school boards to consider (whether they should get involved) in selection procedures for such materia...