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Verbal·Standard English Conventions·Boundaries

hard

At the Rankin Inlet observatory site in Canada, radars point their antennae to the sky to track gravity waves and other geospace phenomena. These radars are not the only ones scanning the __________ more than thirty other radar sites around the globe monitor these same phenomena as part of the Super Dual Auroral Radar Network.

Which choice completes the text so that it conforms to the conventions of Standard English?

A

sky, though,

B

sky, though;

C

sky though

D

sky; though,