I think it’s D!
In a sentence using passive voice, the subject is acted upon; he or she receives the action expressed by the verb. The agent performing the action may appear in a "by the..." phrase or may be omitted. The dog is acting upon the sentence subject (the boy), meaning it uses the passive voice.
On the other side, the grass is greener
Answer: <em><u>C. Signal the person running the meeting whenever you need to stop to clarify information.</u></em>
Explanation: When you are recording a meeting you must clarify all information and make sure you have it right. If information is wrong it would be confusing to read!