$20.$ When you have limited or reduced resources to complete the tasks scheduled at the same time, you need to prioritize the tasks in order to assign the limited resources. Among the competing tasks, which tasks should you assign the limited resources to first?

$$ Tasks that have the no predecessors.

$$ Tasks that have the no dependencies.

$$ Tasks that have the longest durations.

$$ Tasks that have no slacks.

$$ Tasks that are on the shortest path

$$ Tasks that are at the beginning of each path

$$ Tasks that are on the critical path