A new system might have to interface with one or more , which are older systems that use outdated technology. a. mission-critical systems b. intrusion detection systems c. legacy systems d. enterprise resource planning (ERP) systems

c. legacy systems

Explanation:

A new system might have to interface with one or more legacy systems, which are older systems that use outdated technology.

This ultimately implies that, when a new computer system is to replace an older generation system known as legacy systems, it is important to synchronize.

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