Using only regular expressions' OR operator, enter the correct search to find the words "gray" and "grey" at the same time

Suppose an astronomer discovers a large, spherical-shaped body orbiting the sun. the body is composed mostly of rock, and there are no other bodies sharing its orbit. what is the best way to categorize this body? a. planet b. moon c. comet d. asteroid

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The head restraint should be adjusted so that it reaches a.the top of your ears b.the base of your skull c.the top of the head