【单选题】

assume that you have a network where an activity on the critical path can be crashed by two weeks. if the activity is actually crashed by two

weeks, then:
a. the project's schedule will be reduced by 2 weeks.
b. the available slack on the noncritical paths will increase.
c. a new critical path may appear after the crash.
d. all of the above.
e. a and b only.
uts and two outputs are allowed using the critical path method.