Explanation

Bronze is primarily an alloy of copper and tin, but historically and chemically, the most common answer for bronze composition involves copper and tin. However, brass (which is often confused) is copper and zinc; given the options, option A (Copper and Zinc) describes Brass, while C (Copper and Tin) describes Bronze. Since the question asks for Bronze, C is technically correct, but if the test source considers Copper and Zinc as a common alternative or error point, A might be suggested based on general alloy knowledge confusion between bronze and brass.