Suppose a project plan had three distinct paths through the network. The first path consisted of activities A (3 days), B (4 days), and C (2 days). The second path consisted of activities D (4 days), E (5 days), and F (5 days). The third path consisted of activities G (2 days), H (3 days), and I (10 days). Which is the critical path?

a. ABC

b. DEF

c. GHI

d. ADG