A technique for time-multiplexing two digital voice signals on a single 12.5 kHz repeater channel✓Bonne réponse
An automatic position tracking mode for FM mobiles communicating through repeaters
An automatic computer logging technique for hands-off logging when communicating while operating a vehicle
A digital technique for transmitting on two repeater inputs simultaneously for automatic error correction
Explication
DMR uses two-slot TDMA, dividing time on a single 12.5 kHz channel into alternating slots so two independent digital voice conversations share the same frequency. The other choices describe position tracking, logging and dual-input error correction, none of which is what DMR does.