According to the passage, which of the following statement is NOT true？A．While the Global

According to the passage, which of the following statement is NOT true？

A．While the Global System for Mobile Communications (GSM) radio network stretches around the globe, the amount of data which can be transmitted over it is only a small bit.

B．Wireless Local Area Networks (WLANs) has the advantage of broadband, but their local transmitting area is limited.

C．New wireless transmission techniques such as Bluetooth can send data without cables within about ten meters.

D．Until now, any user can move freely between old connection coverage areas and the new network.