the critical path.
b. the project will be delayed because activity e is on the critical path.
c. the project will be delayed because activity e has float of five.
d. none, because activity e has float of four.
for activity e before the change, the es is 7 and the ls is 11. after the change, the es is 7 and the ls is 9.
the change will use two of the four months of float for activity e but will not affect the critical path. choice d is the better of a and d. choice a is just looking at the fact of e being on the critical path before the change.
choice d 