Option A (Receiver): Incorrect. Receivers aren't needed for SWR measurements - antenna analyzers generate their own test signals. Receivers aren't part of the measurement setup. Option B (Transmitter): Incorrect. Transmitters aren't needed for SWR measurements - antenna analyzers generate their own low-power test signals. Transmitters aren't part of the measurement setup. Option D: Incorrect. Since A and B are not needed, 'all of the above' cannot be correct. Only antenna and feed line are needed.