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2. Which is true about UVA and UVB rays?

A. Both rays can be blocked 100% by sunscreen
B. UVA protects the surface, UVB protects beneath the surface
C. UVB rays cause burning, UVA rays cause premature aging

1 answer

C. UVB rays cause burning, UVA rays cause premature aging.

This statement is true, as UVB rays are primarily responsible for causing sunburn and contributing to skin cancer, while UVA rays penetrate the skin more deeply and are associated with photoaging, such as wrinkles and age spots.