Suppose we have a file whose size on disk is 3KB(3210 Bytes). If we encrypt it using the AES block cipher, what do you expect to be the size of the encrypted file? a. a few Bytes shorter than 3KB b. The answer depends on the mode of operation used. c. a few Bytes larger than 3KB d. much smaller than 3KB e. much larger than 3KB f. exactly 3KB