Don't sit there ___nothing.Come and help me.A.do B.to do C.doing D.and doing

Don't sit there ___nothing.Come and help me.A.do B.to do C.doing D.and doing
Don't sit there ___nothing.Come and help me.A.do B.to do C.doing D.and doing

Don't sit there ___nothing.Come and help me.A.do B.to do C.doing D.and doing
C

C. Doing

C
doing 短语做伴随状语，修饰sit 这个动作。。。
其他的不合适。