Dr Marcus Reviews That Waiting-List Control Groups Are Not Always

Multiple Choice

Dr. Marcus reviews that waiting-list control groups are not always appropriate even if it would help answer a set of hypotheses. Dr. Marcus notes that one of the major reasons that a waiting-list control group would not be appropriate for a study is:

A) it would be too costly to include a wait-list control group.
B) it would be unethical and potentially harmful to delay treatment to research participants.
C) if there are not enough participants.
D) if it would require too much time to carry out.