Step 1: Define Bronze.
Bronze is an alloy, meaning it is a mixture of metals. Its primary component is copper.
Step 2: Identify the other alloying elements.
The most common and traditional definition of bronze is an alloy of (A) Copper and (D) Tin. However, the term "bronze" is also used more broadly for copper alloys. Modern bronzes can also contain other elements, including (C) Zinc, to alter their properties. For instance, commercial bronze is 90% copper and 10% zinc. Given the options, the combination that includes the primary components (Copper, Tin) and a common secondary component (Zinc) is the most comprehensive answer.