Option A: Incorrect. Dual-VFO doesn't allow transmitting on two frequencies at once - you can only transmit on one frequency at a time. It's for split operation, not simultaneous transmission. Option B: Incorrect. Dual-VFO doesn't permit full duplex - amateur radio is half-duplex (transmit or receive, not both simultaneously). Full duplex isn't possible. Option D: Incorrect. Dual-VFO doesn't improve frequency accuracy - accuracy comes from the oscillator, not from having two VFOs. Accuracy isn't the purpose.