Final answer:
The subject of this question is Arts, and the correct answer is Mr. Mason's deep and thunderous voice.
Step-by-step explanation:
The subject of this question is Arts. The question asks about the characteristics of Mr. Mason's voice, specifically describing it as deep and thunderous. The options provided mention his singing skills, voice, and love for silent acting. Based on this information, the correct answer is c) Mr. Mason's deep and thunderous voice.