What is the primary difference between symmetric and asymmetric encryption?

What is the primary difference between symmetric and asymmetric encryption?

• A. Symmetric uses the same key to encrypt and decrypt; asymmetric uses a public/private key pair.
• B. Symmetric uses larger keys; asymmetric uses smaller keys.
• C. Symmetric uses two keys; asymmetric uses one key.
• D. Symmetric is slower; asymmetric is faster.

Answer: (A)