Convert the sentence provided below from its passive voice structure to an active voice structure:
The final draft of the report has been reviewed by the supervisor thoroughly.

Correct option is A

The correct active/passive voice of the given sentence is (a) The supervisor has reviewed the final draft of the report thoroughly.
Explain the rules of conversion from passive to active with structure in detail.
When converting present perfect passive to present perfect active, the agent in the ‘by’-phrase becomes the subject, the passive auxiliary has/have been + V³ changes to has/have + V³, and the original subject becomes the object. Adverb placement should remain natural (usually after the object or at the end).
Structure:
· Passive Voice: Subject + has/have been + V³ + (by + Agent) + Adverb
· The final draft of the report + has been + reviewed + (by the supervisor) + thoroughly.
· Active Voice: Agent (now Subject) + has/have + V³ + Object + Adverb
· The supervisor + has + reviewed + the final draft of the report + thoroughly.
· Why others are wrong: (b) changes tense (past simple). (c) changes aspect to past continuous. (d) changes to past perfect. The original is present perfect, so only (a) preserves both meaning and tense.