Which of the following is used to describe the information used in
conjunction with an algorithm to create ciphertext from plaintext?

Select one:
a. Key
b. Code
C. Cleartext
d. Cipher

The best definition of an idiom is a. a word or phrase that describes a noun b. a word or phrase describing a verb c. a phrase containing figurative language in which the word expresses a different idea from its exact meaning d. a phrase that compares two unlike objects or ideas