An easy way to reduce calorie intake during the week is to

a. serve gravies, sauces, or dressings on the side.
b. completely eliminate bread and dairy from the diet.
c. drink 12 glasses of water per day.
d. never eat after 6: 00 pm

How is the central idea developed further? (a) the author elaborates on the treatments for allergies in adults and how they work. (b) the author quotes the reactions of experts and the methods used to conduct the study. (c) the author compares the different rates of food allergies shown in children and adults. (d) the author indicates the limitations of the study because of differences in health care.