常见的⽆线传输媒体有微波、红外、激光和蓝⽛等。相⽐较而言，蓝⽛通信单独具有( )的特点。-问呀课堂

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[单选题]常见的⽆线传输媒体有微波、红外、激光和蓝⽛等。相⽐较而言，蓝⽛通信单独具有( )的特点。

A可越过障碍物进⾏连接

B在视线范围内连接

C可采⽤不可⻅光，保密性强

D结构轻便、设备经济

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