【单选题】

{{I}}Questions 5 to 7 are based on the following conversation;At the end of the conversation, you will be given l5 seconds to answer the questions. Now listen to the conversation.{{/I}} What do the speakers mainly discuss

A、Admission standards at the University of Michigan.
B．The use of standardized tests for college admissions.
C．The TOEFL (Test ofEnglish as a Foreign Language).
D．Evaluation without standardized tests.