Each batch of cupcakes Lena makes uses 3 cups of flour, 1 cup of milk, and 2 cups of sugar. Lena wants to make 5 batches of cupcakes. Which expression represents how many cups of flour, milk, and sugar will she need in all? * A 5 x (3 + 1 + 2)
B 5 x 3 + (1 + 2)
C 5 x (3 + 1) + 2
D (5 x 3) + 1 + 2