The Pacific Ocean’s total volume is roughly twice as large as ______________________.
Which choice completes the text so that it conforms to the conventions of Standard English?
the Atlantic Ocean.
that of the Atlantic Ocean.
those of the Atlantic Ocean.
the water in the Atlantic Ocean.
Correct Answer: B
Choice B is the best answer. The comparison is between the "total volume" (singular) of one ocean and the volume of another. "That of" correctly refers to the singular antecedent.
Choice A is incorrect because it compares "volume" to an "ocean." Choice C is incorrect because "those" is plural. Choice D is incorrect because "the water" is a new noun that is slightly different from the measurement "volume."