Primera: Fino
Segunda: Mojada
Tercera: Vista
Quinta: negro
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.
Explanation:
i think this is the answer
The first person indicative differs between the two (i.e -imos and -emos)
;)