Which One of the Following Teachers Is Using the Recommended

Which one of the following teachers is using the recommended approach to evaluating students' achievement in a cooperative learning situation?

A) Ms.Au has students take notes on what they are learning throughout a cooperative learning session.
B) Mr.Baer's cooperative groups turn in a research paper co-authored by all group members.
C) Mr.Tomlinson's students meet with him in their cooperative groups to explain to him what they have learned during the session.
D) Ms.Irwin gives students a quiz on the material they have studied; students get extra credit if everyone in their group scores high.