Read the conversation and answer the question.
Zeynep is in charge of buying paper cups for her class’s end-of-year party. Her class has 28 students and 3 teachers, so she plans to buy 40 cups. She sees two packages in the store: Package X contains 12 cups for $2.50, and Package Y contains 20 cups for $3.60. She decides to buy two packages of X and one package of Y. Why does Zeynep choose this combination?
A)Because it provided the exact number she needed and was the cheapest option for 40 cups.
B)Because buying only Package Y would be cheaper but she wanted to try two different types.
C)Because Package X alone would give her 36 cups, which is not enough, and she disliked the design of Package Y.
D)Because Package Y had a lower price per cup, so she maximized the number of Package Y.