Answer:
The correct answer is option A.
Step-by-step explanation:
We are aware that we have scarce resources with alternative uses and we need to use these resources to satisfy our unlimited needs and wants. The opportunity cost can be defined as the cost of sacrificing the alternative.
In the given example the decision is regarding going to college, its alternative can be taking up a job. In that case, the opportunity cost will be the wages that could have been earned. Though going to college provides higher earning in the future so this opportunity cost id justified.
Every economic decision involves some opportunity cost.