Which of these is MOST LIKELY to be classified as a reason for Canadians' concern about the environmental issue that is a problem for the Great Lakes? A) The Great Lakes are a favorite Canadian tourist destination.
B) The Great Lakes are a major source of Canada's drinking water.
C) Canadians prefer the beaches along the Great Lakes to those along the coast.
D) Diving on shipwrecks is a growing Great Lakes sport which attracts divers from around the world.