Answer:
A critical path refers to a sequence of task activities whose order and durations directly affect the completion date of a project.
Step-by-step explanation:
A critical path refers to a sequence of task activities whose order and durations directly affect the completion date of a project. The sequence of task and activities can be either parallel or serial which leads to completion of project at the earliest. Option (a) is false as the critical path directly affects the completion date but not indirectly. Option (c) is false as the tasks can be either serial but not parallel always. Option (d) is false as critical path directly effects the completion date which means 100% of the completion of the project not the 40% of the completion of the project. Option (e) none of these is false as the answer is option (b).