Maria is making blueberry muffins using a blue berry cake recipe. To make the muffins, she has to divide the cake recipe in half. If the cake recipe calls for 2/3 cup of milk, which expression can maria use to calculate how much milk she needs to make the muffins.
A 1/2 / 2/3
B. 2/3 * 2
C 2/3 * 1/2
D. 2 / 2/3