The author implies in the excerpt that Mr. Cavor's character spends much of his time alone, as stated in option B and further explained below.
To imply something means to suggest it, that is, to reveal some information that leads to a possible conclusion. In the excerpt we are analyzing here, the author implies something about Mr. Cavor's character.
When the speaker says, "He talked like a man long pent up, who has had it over with himself again and again," he implies that Mr. Cavor had no one else to talk to. He spent so much time alone that, when given the chance to talk, he would do it nonstop.
With the information above in mind, we can choose option B as the correct answer.
Learn more about Mr. Cavor here:
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