Your Instructor Is Interested in Determining Whether Students Perform Better

Your instructor is interested in determining whether students perform better when working in work groups or alone.He takes the scores of a group of students that studied and took the tests alone and compares them to a group of students who studied and took the test as a group.The nominal group would be expected to

A) perform better on the test.
B) perform worse on the test.
C) perform about the same on the test.
D) you can't compare these two on test results because a group test is not an additive task.