I can’t help being touched_____ I see the photo of the little Afghan girl crying over her mum’s body

1. A.
   each time
2. B.
   at each time
3. C.
   each time that
4. D.
   each time when

I can’t help being touched_____ I see the photo of the little Afghan girl crying over her mum’s body

A. each time B. at each time      C. each time that          D. each time when

I can’t help being touched_____ I see the photo of the little Afghan girl crying over her mum’s body

A. each time B. at each time C. each time that 　　　 D. each time when