A software development manager wants to ensure the authenticity of the code created by the company. Which of the following options is the most appropriate?

Code signing uses digital signatures to verify the authenticity and integrity of software. When code is signed, it guarantees that the software originated from the stated publisher (authenticity) and has not been tampered with since it was signed (integrity). This directly addresses the manager's goal of ensuring the authenticity of the code. Testing input validation focuses on preventing vulnerabilities from user input, not code authenticity. Static code analysis identifies potential security flaws in the code but doesn't confirm its origin or integrity after compilation. Ensuring secure cookies are used is a web application security measure, unrelated to the authenticity of the software itself.