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. Hostility(A) does nothing but exacerbate(B) a heated conversation by increasing the yelling(C).
b. Protest(D) clashes erupted(E) at the white nationalist rally to violent(F) the removal of a Confederate statue.