Answer:
The correct option is B,zero monetary cost but a $1,000 per month opportunity cost
Step-by-step explanation:
Monetary cost also known as explicit cost is the actual costs incurred in running a business.But the business in this case is renting of the property,frankly speaking, Jeane has not incurred any cost in her property business,hence monetary cost is zero.
Opportunity is the cost or benefits from alternative course of action. Jeane not renting out the property on commercial basis is the alternative course of action in this case.Since the commercial letting gives $1500 and the letting to her brother gives $500, the difference between the two rents is $1000 which is benefits forgone from letting the house to her brother,that is the opportunity cost.