Q from simpli learn

Question: A project manager is in the process of analyzing activity sequences, durations, resources requirements, and schedule constraints to create an approved project schedule. What should he do NEXT?
Options:
A. Determine Resource Requirement for each activity in the project
B. Use techniques like Critical Path method, What-if Analysis to calculate optimum duration of the project
C. Use this approved schedule duration as a baseline and start tracking the project
D. Create a Network diagram of the project using one of the diagramming methods
admin's picture

Question is not clear.. but answer should be B


C.. After schedule is done there are other activies we cant directly start tracking the project.