Question: If a piece of iron is left outside in the rain, it develops rust. What is the cause of the rust?

A. The iron is getting older

B. The iron is drying out

C. A chemical reaction between the iron, water, and oxygen in the air (oxidation)

✓

D. The cold temperature

📖 Additional Information

The iron is getting older
The iron is drying out
A chemical reaction between the iron, water, and oxygen in the air (oxidation)
The cold temperature

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