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Verbal·Standard English Conventions·Form, Structure, and Sense
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Composed of clay and silicate rocks,        are typically dark in appearance. M-type asteroids, on the other hand, are composed of nickel-iron and appear much brighter.
Which choice completes the text so that it conforms to the conventions of Standard English?
A
C-type asteroids, such as 93 Minerva and 45 Eugenia,
B
asteroids, such as the C-type asteroids 93 Minerva and 45 Eugenia,
C
the C-type classification applies to asteroids 93 Minerva and 45 Eugenia, which
D
93 Minerva and 45 Eugenia are classified as C-type asteroids, and asteroids