Need 12 points
practicing water safety means:

a) never swimming alone
b) only diving in shallow areas
c) only swimming when you are with a friend
d) all of the above

☃ A) never swimming alone
☃ Cancel out B, because you should NOT dive in shallow areas unless you are a trained professional at it, doing so could cause head damage and severe pain.
☃ Cancel out D because We now know it is not all of the above.
☃ And cancel out C, as long as you are around other people, other adults or even a lifeguard, there should be someone there to help in case a emergency.
☃ Which is why your answer is A, never swim alone. 

Require the nobles and clergy to pay taxes.

Ais your answer