question_answer

Select the option showing correctly the change from Active to Passive voice.

They had made shields out of animal hide to protect them selves.

A)  Shields out of animal hide to protect themselves made by them.

B)  Shields out of animal hide have made to protect them selves.

C)  Shields out of animal hide had been made to protect them selves.  

D)  Shields out of animal hide were made to protect them selves by them.