one method for studying opportunity cost is to think in terms of\no risk and ability.\no pros and cons.\no…

Brief Explanations:

Opportunity cost is about the value of the next - best alternative forgone. Trade - offs involve giving up one thing for another, which is closely related to understanding opportunity cost. Risk and ability, pros and cons, and trial and error are not the main ways to study opportunity cost.

Answer:

C. tradeoffs