After a recent security breach, it was discovered that a developer had promoted code that had been written to the production environment as a hotfix to resolve a user navigation issue that was causing issues for several customers. The code had inadvertently granted administrative privileges to all users, allowing inappropriate access to sensitive data and reports. Which of the following could have prevented this code from being released into the production environment?
A. Cross training
B. Succession planning
C. Automate reporting
D. Separation of duties