You’re more likely to regain lost weight if you
a. don’t vary your exercise routine.
b. exercise only at the beginning of the year and not in the later months.
c. only cut back on calories and don’t exercise.
d. restrict fats in your diet but not carbohydrates.

My best guess is C. the reason why is because your body uses calories from food as energy. the more it uses energy, the more fat it burns. so even if you cut back on caloric intake, you would still gain weight because you would still be eating more calories than your body is using for energy.