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Verbal·Standard English Conventions·Form, Structure, and Sense
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When a given industry—water and electricity are two well-known examples—carries high infrastructural start-up costs and other barriers that discourage competition, __________ of just one or two suppliers per municipality. Such industries are known as natural monopolies.
Which choice completes the text so that it conforms to the conventions of Standard English?
A
it often consists
B
they often consist
C
these often consist
D
this often consists