Unauthorized changes can be moved into production is the best concern that is addressed by securing production source libraries. Production source libraries contain the source code of programs that are used in the production environment. Securing production source libraries means implementing access controls, change management procedures, and audit trails to prevent unauthorized or improper changes to the source code that could affect the functionality, performance, or security of the production programs. The other options are less relevant concerns that may not be directly addressed by securing production source libraries, but rather by other controls such as program approval, version control, or change testing. References:
CISA Review Questions, Answers & Explanations Database, Question ID 213
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