Which sentence is written in active voice?

Question

A. The camping trip was ruined by flash flooding.
B. The bicycle was damaged by Tricia and Tim did not damage it.
C. The essay was rewritten before it was submitted.
D. She completed her project before the alarm buzzed.

Answer 1

D. She completed her project before the alarm buzzed.

This sentence is written in active voice because the subject "She" is performing the action of completing the project.