Which of the Following Best Explains the Slope of the Aggregate

Multiple Choice

Which of the following best explains the slope of the aggregate demand curve?

A) The aggregate demand curve slopes downward for the same reasons that market demand curves slope downward.
B) The aggregate demand curve is vertical in the long run because people can only consume a certain maximum quantity.
C) The aggregate demand curve is downward sloping because it shows an inverse relation between the price level and the quantity of all goods and services demanded.
D) The aggregate demand curve is downward sloping because the more people wish to consume, the lower is the price.