sat 语法题 og P677 Q7

sat 语法题 og P677 Q7
1.Civil rights leader and author B was interested in drama because he believed that ( ) could have a greater more lasting effect than any exhibit or lecture.
括号里面可以是A(events which were represented historically on stage)
B(representing historical events on stage)
貌似v-ing和定语从句sat都不是很喜欢啊.求详细解答以及相关题目的应对策略,