Suppose that Julia receives a $20 gift card for the local coffee shop, where she only buys lattes and muffins, If the price of a latte is $2 and the price of a muffin is $1, then we can conclude that Julia

A. should only buy muffins.

B. should only buy lattes.

C. Can buy 10 lattes and 20 muffins if she chooses to buy one of the two goods.

D. Can buy 10 lattes and 20 muffins with her $20 gift card.