Solve the Problem $\frac{5}{9}$ If 4 Cups of Milk Are Used, How Many

Multiple Choice

Solve the problem.
-In a cake recipe, the ratio of milk to flour is $\frac{5}{9}$ . If 4 cups of milk are used, how many cups of flour are used?

A) $\frac{20}{9}$ cups
B) $\frac{5}{36}$ cups
C) $\frac{45}{4}$ cups
D) $\frac{36}{5}$ cups