B. A mixture of flour, sugar, eggs, and butter is baked to become a cake. Remember chemical change is when a substance combines with another to form a new substance. The answer wouldn't be A because the flour and sugar are mixing together, but they could be separated to their original forms. It wouldn't be C because the egg is only broken not chemically changed or formed with anything else. It wouldn't be D because the chocolate squares could be frozen or hardened to change it from icing. B is the best answer. Hope this helps!
-sciencegeek338
