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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 ageing.
​d. UVA rays cause burning, UVB rays cause premature ageing

Answer :

mymomfarted1234
C and if you think A your wrong because sunscreen can block 100% of sun unless you coated on to the point of your entire body

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