Which of the following would BEST help to ensure appropriate security controls are built into...

 The best way to ensure appropriate security controls are built into software is to integrate security throughout the development process. This means that security should be considered from the initial stages of planning, design, coding, testing, deployment, and maintenance of the software. Integrating security throughout the development process helps to identify and mitigate security risks early, reduce the cost and complexity of fixing vulnerabilities later, improve the quality and reliability of the software, and enhance the trust and confidence of the users and customers. Integrating security throughout the development process also aligns with the best practices and standards of information security governance, such as the CISM framework123.

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CISM Review Manual 15th Edition, page 1631

CISM domain 3: Information security program development and management [2022 update]2

CISSP domain 8 overview: Software development security4