Powel Wants to Find Out How Using Fins Increases Swimming

Multiple Choice

Powel wants to find out how using fins increases swimming speed. This hypothesis could be tested with a counterbalanced repeated measures design by:

A) having half the swimmers swim without fins and the other half swim with fins.
B) having all swimmers first swim without fins and then swim with fins.
C) having half the swimmers first swim without fins and then with fins and having the other half swim first with fins and then without fins.
D) having all swimmers first swim with fins and then without fins.