问题详情

Irene Randine was asked to give lectures in the course because______.
A．they wanted to give students a change from the only voice in this busy week
B．they wanted to have a very experienced lecturer to host the course
C．it would be a very concentrated week
D．there were two sessions on "Voice" and "Reading Aloud"请帮忙给出正确答案和分析，谢谢！