Which Is an Example of Balancing Peak Load Demand

Which is an example of balancing peak load demand?

A) Car dealers offer rebates in July and August just before the next year's models are shipped to their lots.
B) An assistant dean signs all of the course substitution requests on Friday afternoon.
C) The minute a student hands in an exam,the professor feeds it through the grading machine.
D) The insurance agent sends in all claim forms on the last working day of the month.