One method for studying opportunity cost is to think in terms of
risk and ability.
pros and cons.
cost and benefit.
trial and error.

cost and benefit.

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. A way in which we can study opportunity cost better is to think in terms of cost and benefit.

greek theater actors are greek

both are true, the congress does have the power to create banks, even if this power is not specifically described in the constitution, since there is nothing restricting it and there is power given to the congress to make "all laws which shall be necessary and proper". maryland was not allowed to tax a branch of the national bank operating there, and the supreme court decided that no state could. both of these topics were discussed in a decision of the mcculloch v. maryland case in 1819.