One major part of the opportunity costs of one's decision to go to college after high-school graduation is the

The opportunity cost that a person could have when they decided to go to college after high school graduation is the opportunity to have a good and full time job after graduation from college. Also a higher salary will be possible upon graduating from college. Opportunity cost means the benefit a person will received upon giving up another thing. 

answer; /// the need to make choices because economic wants exceed economic means;

c. making citizens of the states also citizens of the union. apex g'