单选题 Which of the following statements best explains "wireless holds the key"?

A、 Wireless Internet access is crucial to the development of music industry.
B、 Wireless telephone should be used universally.
C、 Wireless Internet connection is applicable without question.
D、 Wireless Internet connection will be the most profitable means of connection.

【正确答案】 A

【答案解析】[点拨] 题干：下列哪种说法是对“wireless holds the key”最贴切的解释?短语hold the key意为“起控制、支配作用”。