Evaluate the impact of UV-induced mutations on the choice of uracil in RNA and thymine in DNA.

• A. Uracil is used because it is cheaper to synthesize.
• B. Thymine is more resistant to UV light than uracil.
• C. Thymine's methyl group allows cells to recognize and repair mutations more effectively.
• D. Uracil's structure prevents any mutations from occurring.

Answer: (C)