The process of removing extra features that Beth added in order to reduce risks is an example of corrective control.
Corrective control refers to taking steps to address issues, risks, or other problems that have already occurred in a project in order to get things back on track. By removing the extra features Beth added that introduced new risks, the project manager is implementing a corrective action to mitigate those risks.
Preventive control refers to taking proactive measures to prevent potential issues or risks from occurring. Scope creep refers to uncontrolled changes in a project's scope. Detective control is not a standard project management term. So out of the options, corrective control best describes the process outlined in the scenario.
The best answer is C. Corrective control.