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Unless a problem must be corrected, or modifications or enhancements must be made, access to the operational environment is limited to ____ and must be strictly controlled.
Substitute
A good or service that can be used in place of another, allowing consumers to switch between them based on price, preference, or availability.
Equilibrium
A situation where the supply and demand in the market are equal, leading to stable prices.
Margarine
A spread used as a substitute for butter, made from vegetable oils or animal fats.
Producer Surplus
The difference between what producers are willing to sell a good for and the price they actually receive.
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