Are you asking for a verb or is there some sort of word bank???
I can't hear what the audio. You can fill those blanks with any word in my language actually so, If I can't hear the audio, I cannot give you a certain answer. Sorry.
The answer is B) por que.
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.
