33) Three important issues to be considered when adding or decreasing capacity are: A) number of workers, the skill of those workers, and how fast workers can be added or reduced. B) number of workers, the skill of those workers, and use of external capacity. C) maintaining system balance, frequency of capacity additions or reductions, and use of external capacity. D) number of workers, frequency of capacity additions or reductions, and use of external capacity. E) the skill of workers, the cost of workers, and how fast workers can be added or reduced