This is correct. This is a reflexive verb that you are doing to yourself. This translates to, "Normally I brush the hair". If it was something like "Normalmente me cepillo el pelo de Anna" it would be incorrect because you are doing it to Anna, not yourself.
B because it sounds the best :)
The right answers are:
(1) cuatro
(2) parabrisas
Therefore:
<u>Marisa:</u> Vamos, Antonio, que llegamos tarde. Oye, ¿las cuatro llantas tienen aire? ¿y limpiaste el parabrisas para ver bien la carretera?
This translates:
<u>Marisa:</u> Let's go, Antonio, we are going to be late. Wait, Do all four tires have air? ¿Did you clean the windshield to see the road?
