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