Which choice completes the text so that it conforms to the conventions of Standard English?
A
screw’s thread’s.
B
screws’ threads.
C
screw’s threads.
D
screws threads’.
Explanation
Correct answer: C.
Choice C is the best answer. The convention being tested is the use of plural and possessive nouns. The singular possessive noun “screw’s” and the plural noun “threads” correctly indicate that there is only one screw and it has multiple threads.
Why the other choices are wrong
Choice A
Choice A is incorrect because the context requires the plural noun “threads,” not the singular possessive noun “thread’s.”
Choice B
Choice B is incorrect because the context requires the singular possessive noun “screw’s,” not the plural possessive noun “screws’.”
Choice D
Choice D is incorrect because the context requires the singular possessive noun “screw’s” and the plural noun “threads,” not the plural noun “screws” or the plural possessive noun “threads.’”