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. Amazon (A)employees say the company is (B)threatening to fire workers for (C)publicly pushing the company to do more to (D)ship climate change.

b. Amazon, which (E)relies on fossil fuels to (F)power planes, trucks, and vans that (G)combat packages all over the world, has an (H)enormous carbon footprint.