Which choice completes the text so that it conforms to the conventions of Standard English?
A
Moon’s
B
Moons
C
Moons’
D
Moon
Explanation
Correct answer: A.
Choice A is the best answer. The convention being tested is the use of possessive nouns. The singular possessive noun "Moon’s" correctly indicates that there is only one Moon, and it has a gravitational pull.
Why the other choices are wrong
Choice B
Choice B is incorrect because the context requires the singular possessive noun "Moon’s," not the plural noun "Moons."
Choice C
Choice C is incorrect because the context requires the singular possessive noun "Moon’s," not the plural possessive noun "Moons’."
Choice D
Choice D is incorrect because the context requires the singular possessive noun "Moon’s," not the singular noun "Moon."