Directions: 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 sentences grammatically correct?

a. The greatest incentive(A) I have for losing weight is my desire(B) to share a long and healthy(C) life with my family.
b. The woman’s wrong(D) boyfriend never likes to apologize(E), even when he knows he is stubborn(F).