Suppose John and Wayne are the only two demanders of cowboy movies. Each month, John buys six cowboy movies when the price is $10 each, and he buys four cowboy movies when the price is $15 each. Each month, Wayne buys four cowboy movies when the price is $10 each, and he buys two cowboy movies when the price is $15 each. Which of the following points is on the market demand curve?
A.) quantity demanded = 2; price = $15
B.) quantity demanded = 4; price = $25
C.) quantity demanded = 10; price = $10
D.) quantity demanded = 16; price = $25