|Question 18Verbal

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The Orionid meteor shower's brightness typically surpasses that of the Daytime Arietid meteor shower due to the interplay of three main factors—namely, the size and composition of the _______ velocity upon entering Earth's mesosphere, with higher-velocity meteoroids releasing more energy; and atmospheric fluctuations, such as changes in sky conditions.
Which choice completes the text so that it conforms to the conventions of Standard English?
meteoroids; their
A
meteoroids. Their
B
meteoroids, their
C
meteoroids—their
D