The tone of a message is an important factor in communication. It tells the exact way of how the speaker wants to deliver the message. It tells more about the speaker and how he himself perceived the message being sent across.
The tone is also useful for the listener in understanding and perceiving what the speaker meant. The tone could be humorous, sad , joyful, scared etc.
The answer is letter C. A quorom is the term used to describe the minimum number of members who must be present for a legislative body to take official action. The term quorom is a Middle English wording of the commission formerly issued to the justice of peace.