Which of the following is NOT a limitation of PERT?

Select one:

a. Time estimates tend to be subjective and are subject tofudging by managers

b. Only one time estimate can be used for eachactivity.

c.
There is the inherent danger of placing too much emphasis on thecritical path.

d.
Precedence relationships must be specified and networkedtogether.

e.
Project activities have to be clearly defined, independent, andstable in their relationships.