Which statement best describes the reason for delayed onset muscle soreness? a. fast twitch fibers working as slow twitch fibers b. lactic acid accumulating in the muscle c. muscle resting after an intense exertion d. repair process due to microscopic muscle damage

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.