What do you think about the events that are unfolding, the state of our nation, and the leadership of Trump and Biden. what is the status of our Democracy at the moment?how do you feel as an American watching these riots? How do you feel about all of the recent protests in general?

the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.  

porter is writing economic history because he is focusing on the cost of developing vaccines.