Select the option that expresses the given sentence in active voice.
The report was written by the manager.

Correct option is B

The correct active voice of the given sentence is "The manager wrote the report."
Rules for Conversion:
· Passive Voice: Object + was/were + past participle + by + subject
· Active Voice: Subject + past verb + object
Structure:
· Passive: The report (object) was written (verb) by the manager (subject).
· Active: The manager (subject) wrote (verb) the report (object).
Incorrect Options:
· (a) The manager has written the report. (Present perfect; incorrect tense.)
· (c) The manager writes the report. (Simple present; incorrect tense.)
· (d) The manager is writing the report. (Present continuous; incorrect tense.)