You are the project manager on a defense project and are creating a network diagram. Activity A (7 days) and Activity B (12 days) can start immediately. Activity C (3 days) can start after Activity A is complete. Activity D (4 days) and Activity F (3 days) can start after Activity B is complete. Activity E (5 days) can start after Activity C and Activity D are complete. Activity G (6 days) can start after Activity D and Activity F are complete. When Activity E and Activity G are complete, the project is done. What is the critical path?

a. BDE

b. ACE

c. BFG

d. BDG