What information do you need to break a simple substitution cipher?

A. The encrypted message can only be decrypted if you have the table showing the substitution patterns.

B. The encrypted message can only be decrypted if you know how many places each character was rotated when the message was being encrypted.

C. The encrypted message can only be decrypted if you know the encryption key.

D. No information is necessary. Messages encrypted with a substitution cipher can be easily broken using frequency analysis.