Answer:
A. III only
Step-by-step explanation:
One of the very useful tools in project management analysis is the PERT and CPM.
PERT (Program evaluation and review technique) provides valuable information regarding which activities need to be closely watched.
While CPM (Critical Path Method) helps in determining the time required to complete each task, and the minimum time required to complete a project.
Both CPM and PERT serve similar purposes by helping to determine projects or activities that need to be watched closely.