Which of the following descriptions of data encryption methods is wrong?

Which of the following descriptions of data encryption methods is wrong?
A . Data encryption methods are divided into symmetric encryption and asymmetric encryption
B . Asymmetric encryption uses public key encryption and private key decryption
C . The keys used in the symmetric encryption algorithm must be exchanged via email, otherwise there is a risk of key leakage
D . Symmetric encryption algorithms use the same key to encrypt and decrypt data.

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Answer: C