The correct option is B Consider him to be vain
The line "he was a star and that Lucy was soaring up to reach him" indicates that the Cecil in the sentence thinks of himself as better than Lucy- which is a sign of vanity. Though this is the meaning that might have been conveyed to Mr. Beebe by Cecil's use of metaphors, it is not what Cecil actually meant. So, he fears that Mr. Beebe will consider him to be vain. Thus B is the answer.