Refer to the Scenario Below to Answer the Following Questions

Refer to the scenario below to answer the following questions.
Scheduling Tools (Scenario)
Grace has just graduated from university and is totally overwhelmed by her first management job. When she was in school, she could work on projects one at a time; but now she must juggle several projects, each of which has multiple activities. Grace is amazed to find that her supervisor, Linda, has everything planned in a flow chart diagram. Linda's current project is to oversee the construction of an office building, and Grace is determined to understand all of the major activities and potential problems so that she can be more proactive.
-In Linda's flow chart, the amount of time that an individual activity can be delayed without delaying the whole project is called __________.

A) crash time
B) delay time
C) down time
D) slack time
E) the critical path