Given the task definition and input, reply with output. In this task, you will be presented with a question having multiple possible answers in Chinese language. And you should choose a most suitable option out of "A", "B", "C", "D", and "E" based on your commonsense knowledge.

Question: 学生想听教授讲什么，他怎么办？ 
 Options: A 历练 B 笔记 C 完整测试 D 谛听 E 聚焦 

D