Travis Had Designed and Delivered a Two-Week Training Program on Managing

Travis had designed and delivered a two-week training program on managing conflict. His superiors want him to shorten the training to one week. Which type assessment will be most helpful in determining which portion of the training he can leave out and still maintain the effectiveness of the program?

A) Pre-test only
B) Pre/post test
C) Pre/post test with control group
D) Repeated measures