Which describes the letter that belongs where the question mark is? help plz

What is the reason for the “scramble for africa”?

By locating production facilities abroad, multinational corporations must pay more for labor true or false

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves. b. when a river overflows it moves downhill resulting in the formation of caves. c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves. d. when water empties into lakes, sediment is deposited, resulting in formation of caves.