In the following question, two statements are given with some words in bold. Which of the following pairs of bold words must be interchanged to make both the sentences grammatically correct.

a. Obesity (A)taxes the circulatory (B)system, increasing the (C)realm of high blood pressure and (D)diabetes.

b. (E)Adolescent girls getting little exercise might be the result of (F)lingering cultural norms suggesting that athletic (G)participation is more the (H)likelihood of boys than girls.