What is a countermeasure that an organization can employ to improve the confidentiality of data that is transmitted by users and devices?

What is a countermeasure that an organization can employ to improve the confidentiality of data that is transmitted by users and devices?
A . update network cable to use shielded twisted pair cable
B . increase password complexity rules
C . use encryption between sending and receiving parties
D . make sure that operating systems have up-to-date software patches

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Answer: C