Refer to the Accompanying Figure, Which Shows the Market for Cups

Refer to the accompanying figure, which shows the market for cups of coffee. At the original market equilibrium:

A) 50 cups are sold per hour at a price of $1.00 each.
B) 50 cups are sold per hour at a price of $2.50 each.
C) 40 cups are sold per hour at a price of $2.00 each.
D) 60 cups are sold per hour at a price of $1.50 each.