Can you tell me ____?what did you do what you did it do what

Can you tell me ____?what did you do what you did it do what are you doing what you are doing
Can you tell me ____?
A.what did you do B.what you did it do C.what are you doing D.what you are doing
It's cold outside ,you must _____ your coat.
A.put in B.take off Cput on Dwear