Which statement correctly differentiates symmetric and asymmetric encryption?

Which statement correctly differentiates symmetric and asymmetric encryption?

• A. Asymmetric never uses keys.
• B. Symmetric is slower than asymmetric.
• C. Symmetric uses a public/private key pair.
• D. Symmetric uses the same key for encryption and decryption; asymmetric uses a public/private key pair.

Answer: (B)