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. The (A)disappointment of violence is (B)highest in families that are (C)subject to economic or emotional (D)stress.

b. Job (E)dissatisfaction can result from (F)likelihood with one's achievements and position in life or from the feeling that one has failed to make a (G)difference in the (H)insurmountable problems of the job.