Alan Is Somewhat Surprised That He Has Gained a Couple

Alan is somewhat surprised that he has gained a couple of kilograms since coming to university. He has never had a weight problem. He was always active every day in high school sports. Alan admits that his eating habits probably aren't as good as they should be. Still, he eats only three meals a day and a snack at night. He doesn't snack between meals because he doesn't get hungry. The food servers in the cafeteria where he eats always give him generous servings of food. Alan isn't involved with any university sport, but he does play basketball with his friends occasionally. He also has a part-time job and has a full course load. Alan thinks he is more active in university than when he was in high school. In fact, he often feels rushed going to classes because of the distance betwee classroom buildings and the fact that most of his classes are on the third or fourth floor an he has to wait to get an elevator. An initial step that Alan can take toward solving the problem contributing to his weight gain is to

A) take the stairs, instead of the elevator, to class.
B) adopt a vegetarian diet.
C) eliminate all snacks.
D) eat two large meals instead of three each day.