John has $2 in his pocket, which he can use to buy a snack or to rent a dvd. john is hungry, which is a(n) to choose the snack. john decides to use the $2 to buy food. so the satisfaction that john gave up by not renting a video was part of the of his decision. need, benefit marginal benefit, trade-off incentive, opportunity cost

incentive, opportunity cost

Explanation:

An incentive is motivation. Hunger motivates John to buy the snack.  

"John is hungry, which is an incentive to choose the snack."

Opportunity cost is the benefit that is missed or given up when one alternative is chosen over another.

"So the satisfaction that John gave up by not renting a video was part of the opportunity cost of his decision."  

so you can understand and comprehend the meaning or the reasoning of the statement or the message

explanation: