Problems are extremely basic?
The teacher tells them the answer?
Is this multiple choice or something, help me out here
Explanation:
The aggregate demand curve is downward sloping. It implies price levels are falling and the quantity of output will increase as well as the domestic income. The theories that can explain why the aggregate demand curve is downward sloping: the Pigou's wealth effect, the Keynes's interest-rate effect, and the and Mundell-Fleming's exchange-rate effect.
A or C. If you rehearse your timing you will get better at it. Also C because it gives you a set time to do that slide after your first attempt.