What is the primary strength of symmetric-key encryption?

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What is the primary strength of symmetric-key encryption?
A . It allows easy and secure exchange of the secret key.
B . It creates a ash?of a text, enabling data integrity.It creates a ?ash?of a text, enabling data integrity.
C . It can encrypt large amounts of data very quickly.
D . It provides non-repudiation services more efficiently than asymmetric-key encryption.

Answer: C