Many student choose to enter the military before attending college. what would be the opportunity cost of that choice

An advance degree

Explanation:

The value of something, a benefit or profit that must be given up to achieve and acquire something else is called opportunity cost. Since resources such as time, money and land can be to alternatives uses hence there is an opportunity cost associated with each decision, choice and action.  

The opportunity cost of joining military before attending college is that the student can enrol himself for an advanced degree. But since most of the students choose to join the army so when they join the college they have to enrol for undergraduate course.

idk

explanation:

demand is the need and oportunity to buy a given good or service.