|Question 15Verbal

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Text
The small celestial body known as 2060 Chiron is expected to have a relatively short lifetime in the outer solar system. Within just a few million years, 2060 Chiron is likely to migrate into the inner solar system or be destroyed, according to _______ trajectory.
Which choice completes the text so that it conforms to the conventions of Standard English?
astronomers modeling of the objects
A
astronomer's modeling of the object's
B
astronomers modeling of the object's
C
astronomers' modeling of the object's
D