Choose the correct answer: You should take ..... a sport and then you would get more excercise

1 . You should take..... a sport and then you would get more excercise
A off                B up.               C down 
2 I'm trying to work ! Could you please turn your music ........?
A down.                B in.            C out 
3 Just ask and I'm sure the other children will let you join ... . ...
A out.                 B up.                   C in