a) The amount of time an activity can be delayed without delaying the
project finish date
b) The amount of time an activity can be delayed without delaying the early
start date of its successor
c) Waiting time
d) The product of a forward and backward pass
Total float and free float (choices A and B) are the time an activity can be delayed without impacting the entire project or the next activity. CPM (choice D) is a network analysis technique, not waiting time. Choice C is the correct answer.