Recall John's Student Story in the Chapter

Recall John's Student Story in the chapter.How have John's lifestyle habits since high school affected his weight?

A) John increased his activity and decreased his caloric intake,which led to weight loss.
B) John increased his caloric intake and decreased his activity,which led to weight gain.
C) John increased his intake of carbohydrates and decreased his intake of protein,which led to weight gain.
D) John started lifting weights,which led to an increase in his lean body mass and overall weight.