The correct answer is A. 0.384 million km.
The moon orbits the Earth at a mean distance of 384,400 km (238,900 mi). This is about 30 times the diameter of Earth. The moon’s orbit is elliptical, so the distance between the Earth and the moon varies slightly. The closest point in the moon’s orbit is called perigee, and the farthest point is called apogee. The perigee distance is 363,104 km (225,622 mi), and the apogee distance is 405,504 km (251,902 mi).
The moon’s orbit takes 27.3 days to complete. This is the same amount of time it takes the moon to rotate on its axis. This is why we always see the same side of the moon from Earth.
The moon’s gravity has a significant effect on Earth. It causes the tides, and it also stabilizes Earth’s rotation. Without the moon, Earth’s rotation would be much more chaotic, and the days would be much shorter.
The moon is a very important part of Earth’s system. It has played a major role in the evolution of life on Earth, and it continues to be a vital part of our planet.