According to Your Textbook, Which of the Following Is a FALSE

According to your textbook, which of the following is a FALSE statement concerning National Support Groups?

A) Five percent of the U.S. adult population attended a branch of a national support group in the previous year.
B) Participation in a national support group is voluntary.
C) Professional psychologists are active in these groups and serve as the leaders of these groups.
D) The quality of a national support group varies considerably from one locale to another.