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=The Benchmark Assessment asked this:= Which of the following statements accurately uses the concepts of chemical and physical changes? Defend your answer! Share your thought process!
 * A: Mixing different metals makes an alloy, which represents a physical change.
 * B: Turning cement into concrete involves a chemical change for both cement and water.
 * C: Smelting iron ore to produce iron is a chemical change.
 * D: Wait a minute! All of these statements are accurate!

The Following Answers Were Awarded No Credit. Can you tell why?