Q1: Critical path lies along the activities having total float

ANS:C - zero

The critical path consists of activities that have zero total floats. Total float, also known as slack, refers to the amount of time an activity can be delayed without affecting the project's overall duration.

Activities on the critical path have zero total floats, which means any delay in these activities would directly impact the project's completion time. Therefore, the correct statement is that the critical path lies along the activities having zero total floats.