Butler and Roediger (2007) Gave Some Students a Lecture Summary

Multiple Choice

Butler and Roediger (2007) gave some students a lecture summary whereas other "students" received short answer tests with feedback if the participants for half of the answers.A final control group of participants did not get a summary nor did they receive a short answer test.The group that did the best on a later test was:

A) the control group.
B) the group given lecture summaries.
C) all groups performed equivalently.
D) the group that received short-answer tests.