Answer:
A. The first.
Step-by-step explanation:
As it is clearly stated in the above in the project given that the activity time is expected outcomes.
Different supply chain issues such as late arrivals of materials, absence of key personnel and so on which could delay this activity is been dodged therefore, we cannot ignore the impact of variability in activity times when deciding the schedule for this project.
Also the project is keenly followed up by;
1) Planning: includes goal setting, defining the project, and team organization.
2) Scheduling: relates people, money, and supplies to specific activities and relates activities to each other. And also many other factors.