Suppose That Irina Is Prepared to Pay a Maximum of $2.40

Multiple Choice

Suppose that Irina is prepared to pay a maximum of $2.40 for her first glass of cranberry juice,but for each subsequent glass she is only prepared to pay 20 cents less than the previous one.
-Refer to the above information to answer this question.If the price of cranberry juice is 80 cents per glass,how many glasses will she purchase?

A) 3 glasses.
B) 8 glasses.
C) 9 glasses.
D) 10 glasses.
E) Cannot be determined.