*Please expain how you got the answer or reasoning behind the answer/show work, thanks!

7. Which of the following statements about a network's critical path(s) is always true? a. The critical path(s) is the path that passes through the most activities b. The critical path(s) is the path with longest total time duration c. The critical path(s) is the path that passes through the most slack activities d. The critical path(s) is the path that gets us through the network fastest. 8. In these network diagrams, slack is best described a measurement of what? a. The difference between an activity's normal cost and its crash cost b. The difference between an activity's early start and early finish times The difference between the duration of two precedent activities d. The difference between an activity's early start and late start times c