A. I was kept awake by the noise of the traffic.
B. The traffic kept me awake by noise.
C. I kept myself awake due to the noise of the traffi
D. I remained awake by the noise of the traffic.
Given sentence is in Past simple tense and it is in active voice, we need to change it into passive voice.
Rule :
Subject + (was / were) + V3 + Optional Agents.
