E8B11

What is digital time division multiplexing?

1. ATwo or more data streams are assigned to discrete sub-carriers on an FM transmitter
2. BTwo or more signals are arranged to share discrete time slots of a data transmission
3. CTwo or more data streams share the same channel by transmitting time of transmission as the sub-carrier
4. DTwo or more signals are quadrature modulated to increase bandwidth efficiency

Pick an answer to check it.