Each time invited to a dinner,she always refuses, ____she has to take care of her baby. A.to say                    B.saying?C.says                D.having said?

Each time invited to a dinner,she always refuses, ____she has to take care of her baby

1. A.
   to say
2. B.
   saying
3. C.
   says
4. D.
   having said

Each time invited to a dinner, she always refuses 　　　　 she has to take care of hre baby.

A to say　　　　　 B saying　　　　　　 C says　　　　　 D having said