A personal trainer is working with a client who reports not having enough time to exercise. Which of the following is the most effective technique to help the client prioritize his time, improving exercise adherence?A. have the client produce internal experiences to support or enhance exercise participationB. have the client keep a journal that keeps track of daily activities for three daysC. have the client create a list of positive thoughts, such as, "I can do it."D. have the client keep a daily exercise log for six months