A Gym Is Offering a New 6-Week Weight Loss Exercise

Multiple Choice

A gym is offering a new 6-week weight loss exercise program for its members. Members who sign up for the program are weighed and measured once a week for the duration of the program. The owners of the gym want to know if the weight loss program actually helps people lose weight. What variable could be a possible confounding factor in determining the cause of weight loss?

A) The person's commitment to the program.
B) The person's marital status.
C) The person's family structure.
D) The person's diet.