Jerry had 3 3/4 quarts of milk in his refrigerator. He used 1/2 of the milk for a recipe.   How much milk is left in the refrigerator? Express your answer in simplest form.   A. 1 1/2 quarts   B. 1 3/4 quarts   C. 1 7/8 quarts   D. 2 3/4 quarts