Which of These Statements Is Best

Multiple Choice

Which of these statements is best?

A) PERT is a network technique similar to CPM, but PERT allows for project crashing, whereas CPM does not.
B) In PERT, the most likely completion time of an activity is used to represent that activity's time within a project.
C) The expected completion time and variance of an activity is approximated by the normal distribution in a PERT analysis.
D) PERT was developed for a project for which activity or task times were uncertain.