Each point along the market demand curve shows
a. the quantity of the good that firms would be willing and able to supply at a specific price
b. the relationship between the price of the good and total quantity demanded at a series of prices
c. the opportunity cost of supplying a given quantity of goods to the market
d. the quantity of the good that consumers would be willing and able to purchase at a specific price
e. how population changes affect the quantity demanded at a specific price