Answer:
Th answer is: A) Rent a car.
Step-by-step explanation:
If the consumer rents the car he will spend $60 ($30 per day x 2 days) in rent and $240 (= $5 per hour x 48 hours) in used time. His total cost will be $300.
If the consumer buys a plane ticket he will spend $400 and $10 ($5 per hour x 2 hours) in used time. His total costs will be $410.
Since both marginal utilities are the same, we have to choose the alternative with the lowest possible cost; rent a car.