Final answer:
When a negotiator invents new options to meet the other side's needs, this is called expanding the pie.
Step-by-step explanation:
The correct answer is C) expanding the pie. When a negotiator invents new options to meet the other side's needs, it is called expanding the pie. This strategy involves finding mutually beneficial solutions that create value for both parties, rather than simply dividing existing resources. For example, in the context of a negotiation over fruits, expanding the pie could involve exploring the possibility of trading different quantities of each fruit to maximize overall satisfaction.