What is the key difference between hashing and encryption?

• A.Hashing is faster, because the standard allows retired keys to remain available for ongoing encryption operations for cloud-hosted CDE components
• B.They are the same thing, since displaying a full PAN is permitted for any employee who has completed security awareness training, making display restrictions a training matter rather than an access control
• C.Encryption is one-way, as encryption removes a system component from the cardholder data environment automatically for encrypted PAN held at rest
• D.Hashing is a one-way process that cannot be reversed, while encryption is a two-way process where data can be decrypted back to its original form