While doing the project planning of a Construction project, using PERT, it is intended to identify the variance of the project. This can be done by:

• A. Sum of variance of the activities along critical path of the project
• B. Sum of squares of the total floats of all activities in the project
• C. Sum of squares of free floats of all activities along the critical path of the in the project.
• D. Sum of variance of all activities of the project