Hi! In my economics class, we are looking at the competition Bureau, but I am having trouble answering this practice question. I correctly selected one, but cannot figure out the rest. Can someone explain this to me? Thank you.

Q: Classify each situation to the most likely area of investigation for the Competition Bureau. Cold FX claiming that their product will prevent you from getting a cold Truth in Advertising Westjet purchasing Air Canada Cartels Microsoft tying MS Explorer to sales of Windows for all computer manufacturers Mergers and Acquisitions + A Canadian oil company joins OPEC. Abuse of PowerChoose. Cartels Mergers and Acquisitions Truth in Advertising Abuse of Power