19. Which of the following statements concerning CPM activities is false?
Select one:
a. The late finish is the earliest of the late start times of all successor activities.
b. The early finish of an activity is the early start of that activity plus its duration.
c. The late start of an activity is its late finish less its duration.
d. The early start of an activity is the latest early finish of all preceding activities.
e. The late finish of an activity is the earliest late start of all preceding activities.