Concept:Active voice focuses on the subject performing the action, while passive voice focuses on the object receiving the action.
Rule / Clue:The given passive sentence uses present perfect tense ("Has been reviewed") with "by the advisory board" as the doer. In active voice, the doer becomes the subject, and the tense (present perfect) must be preserved.
Explanation:Step 1: Identify the doer — "the advisory board". This becomes the subject in active voice.
Step 2: Identify the action and tense — "has been reviewed" is present perfect passive. Active form is "has reviewed".
Step 3: The object "the proposal" becomes the direct object in active voice.
Step 4: Keep the question structure and the word "yet" to match the original meaning.
Result: "Has the advisory board reviewed the proposal yet?"
Option A changes tense to present continuous. Option B changes to simple past. Option D is not a question and is still passive in meaning. Only option C correctly preserves both tense and active structure.
Answer:C. Has the advisory board reviewed the proposal yet?