In Economics,cost Is Measured as ________,And Benefit Is Measured as ________

In economics,cost is measured as ________,and benefit is measured as ________.

A) what you must give up to get something;what you are willing to give up to get it
B) what you are willing to give up to get it;what you must give up to get something
C) what you are willing to pay on the margin;what the government pays you when you are unemployed or retired
D) the amount of money that you pay on the margin;the amount of money that you receive on the margin
E) the amount of money that you pay for something;the amount of money that someone else is willing to pay you