Which of these is a way to reduce the possibility of transmitting hiv? a. using bare hands to handle blood samples in a doctor's office b. avoiding sexual activity with multiple partners c. sharing needles used for drugs d. a mother with hiv breast-feeding her child

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.