Answer:
A. It is the income foregone by not using a resource in an alternative way.
Step-by-step explanation:
Opportunity cost is the income foregone by not using a resource in an alternative way.
Opportunity cost is refers to the value of what you have to give up in order to choose something else. It can also be called REAL COST.
It also refers to the value or benefits of something that must be given up in order to acquire another thing.