Its B i think hope this helps !
First of all is there supposed to be a picture added to the question? Like with the warmups. If not then ig ill try to answer yor question without them.
If your doing vocal warmups like i do in choir it opens up your pipes so when your singing you can hit all your nots cause you vocal chord are warmed up. Thats the same for talking
Answer:
I think it is unshielded coaxial. Not 100% sure.
Explanation:
