Answer: Option (A) is correct.
Step-by-step explanation:
The statement in the question best describe the economic concept of real cost of some activity that is foregone to get the satisfaction from the other activity.
There is one more economic concept that is opportunity cost. Opportunity cost refers to the cost or benefit that must be give up by choosing some other alternative.
In our case, you have to decide whether you want to join accounting club or economics club and timings of both the clubs are same. Therefore, you have to choose one club and give up the other one. The cost of giving up is the opportunity cost.