Final answer:
China selected the dark side of the moon for the landing of Chang'e 4 because it offers a unique scientific opportunity.
Step-by-step explanation:
China selected the dark side of the moon as the location for the landing of Chang'e 4 primarily for A) The dark side offers a unique scientific opportunity. Unlike the near side of the moon, which is visible from Earth, the dark side always faces away from Earth, providing valuable opportunities for studying cosmic radiation, the solar wind, and the universe at radio wavelengths without interference from Earth's radio signals. This allows scientists to gather new and valuable data that cannot be obtained from the near side of the moon.