What is the most accurate rough order of magnitude (ROM)?
A. In the Initiation phase, the estimate is in the range of +/- 50%.
B. In the Planning phase, the estimate is in the range of +/- 50%.
C. In the Monitoring and Controlling phase, the estimate is in the range of +/- 15%.
D. In the Closing phase, the estimate is in the range of +/- 15%.