Time left $0$:$36$:$49$

You have a project with the following activities: Activity A takes $40$ hours and can start after the project starts. Activity B takes $25$ hours and should happen after Activity A$.$ Activity $C$ must happen after activity $B$ and takes $20$ hours. Activity D must happen after activities $B$ and takes $30$ hours.

Activity $E$ must take place after activity $C$ and takes $10$ hours. Activity $F$ takes place after Activity $E$ and takes $5$ hours. Activity $G$ takes places after Activities $F$ and D$.$ Activity $G$ is the last activity of the project and take $10$ hours. Which of the following is true if Activity D$\text{'}$s duration actually takes $37$ hours?

a$.$ The critical path increases by $7$ hours.

b$.$ The critical path is $110$ hours.

c$.$ The critical path changes to A$,$ B$,$ D$,$ G$.$

d$.$ Tie critical path remains A$,$ B$,$ C$,$ E$,$ F$,$ G$.$