A grocer sells 30 loaves of bread a day. The cost is $2.50 per loaf. The grocer estimates that for each $0.50 increase in cost, 2 fewer loaves of bread will be sold per day. Let x represent the number of $0.50 increases in the cost of a loaf of bread. The graph for the situation is shown below.

For what number of $0.50 increases in the cost of a loaf of bread will the grocer's generated revenue be greater than zero?

A.
The grocer's generated revenue will be greater than zero for any number of $0.50 increases greater than 15.
B.
The grocer's generated revenue will be greater than zero for any number of $0.50 increases less than 20.
C.
The grocer's generated revenue will be greater than zero for any number of $0.50 increases less than 15.
D.
The grocer's generated revenue will be greater than zero for any number of $0.50 increases greater than 20.