The next best alternative given up when making a choice is called the
A. opportunity cost
B. comparative advantage
C. primary objective
D. negative consequence
Please select the best answer from the choices provided.

Is an official language in every north african country

The first atomic explosion was detonated in the desert north of alamogordo, new mexico, on july 16, 1945. what percentage of the strontium-90 ( yr) originally produced by that explosion still remains as of july 16, 2016?

What are the 28 countries in the eu?