The controls and indicators on the XTS $5000$ handset allow users to operate the radio. Match each control with its function.

Concentric switch

Universal connector

$16-$ position select knob

PTT button

A$)$ Selects a channel for sending and receiving messages

B$)$ Activates the radio's transmitter

C$)$ Allows for programming and loading encryption keys

D$)$ Selects encrypted or non$-$encrypted transmission modes