An electrical fault could have caused the fire.

voice mcqs

A. The fire had been caused by an electrical fault.
B. The fire could have been caused by an electrical fault.
C. The fire was caused by an electrical fault.
D. The fire could be caused by an electrical fault.

Given sentence is in future perfect tense and it is in active voice.

Rule :
Subject + Model verb + (have has) + been + V3 + Other agents

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