In the following question, a sentence has been given in Active/Passive Voice. Out of the four alternatives suggested, select the one which best express the same sentence in Passive/Active Voice.
She had locked the door, before she left.

Options

A. She locks the door, before she leaves.
B. She locked the door and left.
C. The door was locked by her, before she took leave.
D. The door had been locked by her, before she left.

Answer

D