Explanation
Invest in secure coding training and application security guidelines is the most effective approach for the manager to use to address the issue of common vulnerabilities in the applications developed by the team.
Secure coding training can help the developers learn how to write code that follows security best practices and avoids common mistakes or flaws that can introduce vulnerabilities. Application security guidelines can provide a set of standards and rules for developing secure applications that meet the company's security requirements and policies. By investing in secure coding training and application security guidelines, the manager can improve the security awareness and skills of the development team and reduce the number of vulnerabilities in their applications. References: CompTIA Security+ Certification Exam Objectives, page 9, Domain 2.0: Architecture and Design, Objective 2.3: Summarize secure application development, deployment, and automation concepts 2 CompTIA Security+ Certification Exam Objectives, page 10, Domain 2.0:
Architecture and Design, Objective 2.4: Explain the importance of embedded and specialized systems security
3 https://www.comptia.org/blog/what-is-secure-coding

Another form of physical destruction, shredding may be the most secure and cost-effective way to destroy electronic data in any media that contain hard drives or solid state drives and have reached their end-of-life. It's also very effective for optical drives, smartphones, tablets, motherboards, thumb drives and credit card swipe devices, to name a few.
Shredding is a great way to destroy data if you have a large data enterprise center or a large stockpile of old hard drives and media that you want to destroy. It's very secure, fast and efficient. Shredding reduces electronic devices to pieces no larger than 2 millimeters. If you work in a high-security environment with high-security data, shredding should be your number one choice as it guarantees that all data is obliterated.
https://dataspan.com/blog/what-are-the-different-types-of-data-destruction-and-which-one-should-you-use/