Which must be measured regularly to identify variances from the plan?

Obviously D. Project Performance. For more clarity, A. Stakeholder requirements DO NOT change that often unless there's a major change of plan. B. Project controls are those steps that you implement to ensure performance. C. Control Schedule are those aspects that you envisage prior to execution of the project plan. 

My answer is for option C. Control Schedule

Of course it is D - Project Performance .

The answer is D, Project Performance

My answer is A, all stakeholders requirements

Knowledge , skills and experience.

Thank for the invitation. More convenient choice is Option D - Project performance.

The most be measured at first project performance accor ding to budget control and standard cost control Measuring department performance with all operations criteria Project schedulea Profitability according to industry criteria And bench marking of the industry And feasibility of the project

Thank you for the invitation. My answer is D

Option D - Project performance.

Thank you. I seem option D-Project performance is good answer.