The correct answer is B. 29.35 days.
The moon takes 29.35 days to orbit the Earth. This is called the sidereal month. The synodic month, which is the time between two full moons, is 29.53 days. This is because the Earth is also orbiting the Sun, so the Moon has to travel a little further to catch up to us.
The moon’s rotation is also tidally locked to the Earth, which means that the same side of the Moon always faces the Earth. This is because the Moon’s gravity has caused the Earth’s tides to slow down the Moon’s rotation.
The moon’s orbit is not a perfect circle, so its distance from the Earth varies. The closest point in the Moon’s orbit is called perigee, and the farthest point is called apogee. The average distance between the Earth and the Moon is 238,900 miles (384,400 kilometers).
The moon’s gravity has a significant effect on the Earth. It causes the tides, and it also stabilizes the Earth’s rotation. Without the moon, the Earth’s day would be much shorter, and the weather would be much more extreme.