The Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol is necessary in Wi-Fi networks because ___________.

A.
RF transmissions can be captured and decrypted without CSMA/CA.

B.
Wi-Fi clients need a standardized method of conserving battery power.

C.
802.11g and 802.11b transceivers need an interpreter for compatibility.

D.
The wireless transmission medium is half-duplex, thus shared by all users.

E.
Wireless data must be converted to a format that is compatible with Ethernet networks.