Which of the following is true of Symmetric Encryption?

Which of the following is true of Symmetric Encryption?

A.
Both communicating parties using Symmetric Encryption use different keys for encryption and decryption

B.
The material used to build these keys must be exchanged in a secure manner

C.
Both communicating parties using Symmetric Encryption use the same key for encryption and decryption

D.
The material used to build these keys does not have to be exchanged in a secure manner

E.
Information can be securely exchanged only if the key belongs exclusively to the communicating parties