When implementing a solution to a problem, which of the following is the BEST course of action to take?

Replacing all components simultaneously makes it impossible to identify the specific faulty component or solution, and it can introduce new problems.

Replacing all hardware associated with the problem first is inefficient and costly, as only one component might be faulty, and it does not follow a systematic approach.

Purchasing new parts without proper diagnosis is a costly and inefficient approach, as the issue might not even be hardware-related or might be resolvable with existing resources.

Implementing one change at a time is crucial because it allows an administrator to pinpoint exactly which change resolves the issue and to easily revert any unsuccessful changes without introducing new complexities or problems. This systematic approach prevents multiple changes from masking the true cause or cure.