Which choice completes the text so that it conforms to the conventions of Standard English?
A
has come
B
comes
C
is coming
D
come
Explanation
Correct answer: D.
Choice D is the best answer. The convention being tested is subject-verb agreement. The plural verb "come" agrees in number with the plural subject "nematodes."
Why the other choices are wrong
Choice A
Choice A is incorrect because the singular verb "has come" doesn’t agree in number with the plural subject "nematodes."
Choice B
Choice B is incorrect because the singular verb "comes" doesn’t agree in number with the plural subject "nematodes."
Choice C
Choice C is incorrect because the singular verb "is coming" doesn’t agree in number with the plural subject "nematodes."