Answer:
a. Systems testing
Explanation:
According to my research on information technology, I can say that based on the information provided within the question the term being defined is called System Testing. Like mentioned in the question, this is a technique used in order to evaluate the complete system the system's compliance against specified requirements, which tests its functionalities from an end-to-end perspective in order to evaluates patches used to close software vulnerabilities and make sure it complies with all policies.
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