The correct option is (a) a he has already been to the asteroid.
In the lines provided, we can see Kenniston conversing with another individual. They are debating whether or not they should return to an asteroid and the need to locate a ship in order to do so.
In this situation, we may infer that Kenniston has previously gone to the asteroid because he remarked, "We've got to get back." An inference is something that the text doesn't express literally but that we can comprehend when we read the text.
The quotes from Kenniston have been, "You are aware that we have two weeks to return to that asteroid. We must send a ship here ".
Through these lines, Kenniston responded, indicating that they had a set amount of time to get back to the asteroid. Time has been Kenniston's limiting factor, and in order to return to the asteroid, they must board the ship.
Learn more about Kenniston conversing:
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