As the lead event planner for a large international conference, you are responsible for coordinating a series of tasks ranging from booking venues to securing speakers and organizing catering services. Some tasks can be shifted a bit without affecting the overall timeline, whereas others are set in stone. For instance, the keynote speaker can only present during a specific time slot, but choosing the color scheme for the event materials has more flexibility. In planning the event schedule using project management techniques, you want to explain to your team the concept of 'slack time' by relating it to one of the event planning tasks. Which of the following best describes 'slack time' in this scenario?

Group of answer choices

Slack time in a project network is the amount of time that an activity would take assuming very unfavorable conditions.

Slack time in a project network is the shortest amount of time that could be required to complete the activity.

Slack time in a project network is the amount of time that you would expect it would take to complete the activity.

Slack time in a project network is the difference between the expected completion time of the project using pessimistic times and the expected completion time of the project using optimistic times.

Slack time in a project network is the amount of time that an activity can be delayed without delaying the entire projec