How does eliminating hardcoded or default passwords help to secure an environment?

Eliminating hardcoded or default passwords enforces the adoption of secure credential management practices, often by storing sensitive information in a dedicated, secure repository or vault, which centrally manages and protects these credentials from unauthorized access and prevents known backdoors.

While eliminating hardcoded passwords often leads to central management, option A provides a more comprehensive explanation of how this practice secures the environment by enforcing secure storage.

Helping penetration testing teams focus on other issues is a beneficial side effect but not the primary security mechanism or direct benefit of removing hardcoded passwords.

Removing backdoors is a direct outcome, but option A explains the mechanism by which this is achieved, which involves enforcing secure password storage in a repository.