Bronze is a metal alloy consisting of which components?

• A. A copper alloy of 95% copper and 5% tin
• B. A mixture of copper and zinc only
• C. A metal alloy consisting of 90% copper with tin (and sometimes zinc)
• D. Pure copper

Answer: (C)

Bronze is a copper-based alloy where tin is the primary additive, giving it more hardness than plain copper; sometimes small amounts of other elements, like zinc, may be included in certain bronze varieties. The option that describes mostly copper with tin, and sometimes zinc, captures this general composition best without tying it to a single fixed percentage. The other choices mislead you: pure copper isn’t bronze, and copper with zinc points to brass, not bronze. An exact percentage like 95% copper and 5% tin is possible for some bronzes, but bronze isn’t defined by a single fixed ratio, so the broader copper-tin (with possible zinc) description is the most accurate.