Using the values listed in the following table, which of the following options is the critical path?

1212In order to calculate the critical path, one must follow two steps:
+ Draw out the network diagram
+ Add the duration of each activity that falls within the individual network paths.
The network diagram and the three network paths existing within it are showed in Figure 6.1.
The following is the duration of each of those paths:
A-B-D-F = 17
A-C-D-F = 19
A-C-E-F = 21.