Which choice completes the text so that it conforms to the conventions of Standard English?
A
describes
B
describe
C
have described
D
are describing
Explanation
Correct answer: A.
Choice A is the best answer. The convention being tested is the use of verb forms within a sentence. The singular verb "describes" agrees in number with the singular subject "map."
Why the other choices are wrong
Choice B
Choice B is incorrect because the plural verb "describe" doesn’t agree in number with the singular subject "map."
Choice C
Choice C is incorrect because the plural verb "have described" doesn’t agree in number with the singular subject "map."
Choice D
Choice D is incorrect because the plural verb "are describing" doesn’t agree in number with the singular subject "map."