The District Magistrate of a City Has Decided to Reconstruct

Multiple Choice

The district magistrate of a city has decided to reconstruct the most frequented street of the city. He plans to block the street for the duration of the work, which will cause considerable inconvenience to the people of the city. The project has three parallel paths defined as the following:
Path A-B-C-H will take 16 days.
Path A-D-E-H will take 22 days.
Path A-F-G-H will take 30 days.
In the given scenario, which of the following statements is true?

A) The expected duration of the project is 68 days.
B) Activities B, D, and F have an earliest starting time of 0.
C) Path A-D-E-H has the largest slack time.
D) Path A-F-G-H is the critical path.