Everyone each ran 3.75 miles.
3.75 times 4 = 15
and
15/4 = 3.75
The answer is A. Tú tocas el piano. Because Tu tocas is the only correct way of saying you are playing the piano in this instance. C is saying "tocan" which is wrong because it's saying you but then using a the group form of playing. The same thing with B, it's also using the group form of playing and it's past tense. And D is using the I form of playing not the you form.
Botas my dude also if I’m late I’m sorry hope you did well on this byeeeeeee