In the following sentence, one phrase has been printed in bold. Below the sentence, three meanings are given. Select the correct meaning of the phrase from the options given below.

She: He doesn’t look intelligent.
He: You can’t judge a book by its cover.

A. Don’t judge something primarily by its appearance.
B. One shouldn't prejudge the worth or value of something by its outward appearance alone.
C. One can easily prejudge the worth or value of something by its outward appearance alone.