The Passive form of ."Have they controlled the disease ?"
A'"Have the disease been controlled by them ?'
B'Has the disease been controlled by them ?"
C"Has been the disease controlled by them ?"
D"Has the disease be controlled by them ?"
The Passive form of ."Have they controlled the disease ?"
A'"Have the disease been controlled by them ?'
B'Has the disease been controlled by them ?"
C"Has been the disease controlled by them ?"
D"Has the disease be controlled by them ?"