The sideral period of the moon
A) is about 27.32 days long.
B) is the period of time for the moon to orbit Earth once with respect to the stars.
C) is the period of time between successive eclipses at a given location on Earth.
D) is the period of time from when the moon rises until the moon rises again the next night.
E) a and b above

Question

Quizplus · Accepted Answer

The sidereal period of the moon is the time it takes for the moon to complete one orbit around Earth with respect to the stars, rather than just its apparent position in the sky as seen from Earth. This period is about 27.32 days long, so choice A is correct. Therefore, choices A and B (which are both true statements about the sidereal period) must be selected, making choice E the best answer. Choices C and D are incorrect, as they refer to other periods of the moon that are not related to its sidereal period. Choice A is correct because the sidereal period of the moon is approximately 27.32 days long.
Choice B is correct because the sidereal period is defined as the time it takes for the moon to orbit the Earth once with respect to the stars.
Therefore, both options A and B are correct, making choice E the best answer. 
Choices C and D are incorrect because they do not describe the sidereal period of the moon.

The Sideral Period of the Moon