When the robber pointed the gun to her head,...

Câu hỏi: When the robber pointed the gun to her head, she immediately did what he wanted.

A. On pointing the gun to her head, she immediately did what he wanted. 

B. On pointing the gun to his head, she immediately did what he wanted. 

C. She immediately did what he wanted when the gun pointed to his head. 

D. When being pointed the gun to her head, she immediately did what he wanted.