E8D03

Which describes spread spectrum frequency hopping?

1. AIf interference is detected by the receiver, it will signal the transmitter to change frequencies
2. BRF signals are clipped to generate a wide band of harmonics which provides redundancy to correct errors
3. CA binary bit stream is used to shift the phase of an RF carrier very rapidly in a pseudorandom sequence
4. DRapidly varying the frequency of a transmitted signal according to a pseudorandom sequence

Pick an answer to check it.