____________ is the application of total resources ($-workers-supports) and activity durations of the logic diagram.

Scheduling is the process of assigning resources (such as labor, materials, and equipment) to project activities and determining the timing and sequence of these activities. The term "scheduling" specifically refers to the application of total resources (including workers and support) and the activity durations outlined in a logic diagram. The logic diagram, often depicted as a network or Gantt chart, shows the sequence and dependencies of project activities, enabling planners to establish a timeline for the project.

Option A: Planningis broader and includes not only scheduling but also the development of strategies, policies, and procedures for achieving the project's objectives.

Option B: Forecastinginvolves predicting future project performance based on current data, not directly the application of resources and activity durations.

Option D: Modelingrefers to the creation of representations or simulations of the project, which may include scheduling but is not limited to it.

Thus,C. Schedulingis the correct answer as it accurately describes the application of resources and activity durations within a logic diagram.