Robert is baking a cake. The instructions tell him to weigh all the ingredients before mixing. He has 100 g of eggs, 100 g of water, and 250 g of flour. He decides to weigh the cake after baking. It weighs 425 grams. He is confused by the results. Which answer supports what happened during the mixing and baking process. A. Baking is a closed system, so he must have mismeasured. None of the reactants left the system.

B. Baking is an open system, so he must have mismeasured. None of the reactants left the system.

C. Baking is a closed system, so he measured correctly. Some of the reactants may have left the system.

D. Baking is an open system, so he measured correctly. Some of the reactants may have left the system