Which of the following is the primary weakness of symmetric-key encryption?

Which of the following is the primary weakness of symmetric-key encryption?

A.
Data encrypted using symmetric-key encryption is subject to corruption during transport.

B.
Symmetric-key encryption operates slower than asymmetric-key encryption.

C.
Symmetric-key encryption does not provide the service of data confidentiality.

D.
Keys created using symmetric-key encryption are difficult to distribute securely.