When a person makes a choice, there is always a
a.
cost
b.
regret
c.
benefit
d.
problem

A. cost.

In economics, opportunity cost represents the benefit that a person misses out on when choosing one alternative over another. In every decision we make, there is a cost involved, even when the cost is only the inability of picking another alternative instead.

Opportunity costs are often overlooked, but they are important to consider when making any decision.

corrupt also means cruel

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.