Project managers often focus their valuable resources on ensuring the timely completion of activities on the critical path in a project. Which of the following statements concerning such activities is true?

Group of answer choices

The duration of the shortest path through a project's network diagram determines the length of the project and is called the critical path.

Activities on the critical path may have positive or negative slack as long as the overall slack time of the critical path is zero.

To successfully complete a project in the least amount of time, a project manager only needs to complete the activities on the critical path.

The Earliest Start (ES) and Latest Start (LS) time for critical activities are always equal to each other.