Which of the following companies do you think best exemplifies the marketing concept?

Question 4 options:

	A grocery store that regularly reviews its register receipts and tries to reduce prices on those items most frequently purchased by its customers.
	A used car salesman who steers you to a more expensive option even though you clearly are more interested in a lower priced model.
	A new computer operating system that launch a new version every year for an increase in user fees and ceases customer support for the older system.
	A cat food company that suddenly drops its price by 10%.