Which of the following descriptions about directional antennas is wrong?

Which of the following descriptions about directional antennas is wrong?
A . Directional antennas are radiated in a certain angle range on the horizontal pattern, which is commonly referred to as directional antennas.
B. The directional antenna has the strongest energy gathering ability, and the direction of the signal is excellent
C. When the number of remote link points is small, or the angle and orientation are quite concentrated, the use of directional antennas is the most effective solution
D. Only the main lobe of the directional antenna has practical use, so the side lobe can be ignored

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Answer: D