As described in the botany textbook, the root system of the oak tree is significantly more extensive than ______________________.
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writingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
pine trees
B
that of pine trees
C
the pine trees
D
those of pine trees
Correct Answer: B
Choice B is the best answer. The subject is "root system" (singular). It must be compared to the root system of pine trees. "That of" is the correct singular pronoun.
Choice A is incorrect because it compares a "system" to "trees." Choice C is incorrect because it repeats the illogical comparison of A. Choice D is incorrect because "those" is plural.