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. A (A)general strike over pension (B)reforms in France in 1995 also (C)crippled the transport system for three weeks and drew (D)deficit popular support.

b. In November, a (E)report commissioned by French Prime Minister Édouard Philippe (F)concluded that, under the (G)existing system, France’s pension (H)massive could be as high as €17.2bn by 2025.