Which spf level should a person look for in sunscreen as part os planning a day at the beach?

a. 10
b. 15
c. 20
d. 30

30 to prevent the rays of the sun from damaging their skin

I’m going to guess these are the choices: a) recreational skiing developed in the mid-19th century b) it was originally invented as a way of getting from place to place in snowy regions c) downhill skiing is currently the only common form of the sport d) it mostly evolved from snowshoeing- if that’s the cases then the answer would be c) downhill skiing is currently the only common form of the sport