Which of the following results from the fact that signals propagated by the ionosphere are elliptically polarized?

When radio waves travel through the ionosphere, their polarization is randomly twisted and altered due to the interaction with ionized particles and the Earth's magnetic field. This shifting results in elliptical polarization, meaning the signal's physical orientation is constantly changing as it arrives back on Earth. Because the polarization arrives in a mixed or random state, it does not matter whether the receiving or transmitting antenna is vertically or horizontally polarized. The signal will be picked up equally well by either. Distractors suggesting that both antennas must match are describing line-of-sight propagation, which is the exact opposite of what happens with ionospheric skywave propagation.