Construction Planning and Management
Pick up the correct statement from the following with regards to C.P.M. network analysis of projects

The latest occurrence time for the node at which the activity arrow terminates, is called latest finish time
Earliest occurrence time of the event from which the activity arrow' originates, is called earliest start time of the activity
All listed here
The latest occurrence time of the node of which the activity arrow terminates minus the duration of the activity, is called latest start time

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Construction Planning and Management
Whenever an activity has zero total float, then

Free float and independent float both must be zero
Free float and independent float both need not be zero
Independent float must be zero but free float need not be zero
Free float of the activity must be zero but independent float need not be zero

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