Which of the following studies is gradually replacing 
scanning for the diagnosis of pulmonary embolus?
Definitions:
Choice Set
The collection of all possible alternatives or options available to a decision-maker.
Price Decreases
A reduction in the cost at which goods and services are sold, typically influencing demand.
Marginal Utility
The additional satisfaction or utility a consumer gains from consuming one more unit of a good or service.
Video Game Rental
A service that allows consumers to borrow video games for a limited period of time for a fee.
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