If the Schedule Shows a 5 Day Slack Between the End

If the schedule shows a 5 day slack between the end of Task A and start of Task B, this means:

A) you must start Task B as soon as Task A ends.
B) Task B start is late.
C) Task A is taking longer to complete.
D) Task A and Task B should be performed concurrently.
E) Task B start can be delayed up to 5 days after Task A's scheduled completion.