All of the Following,except One,is Demand

Multiple Choice

All of the following,except one,is demand.Which is the exception?

A) The quantities which consumers are willing and able to buy per period of time at various prices.
B) The relationship between various prices and quantities demanded for a product.
C) A hypothetical construct which expresses the desire and ability to purchase,not at a single price,but over a range of prices.
D) The quantities which consumers want to buy.