During the trans-Saharan trade, about _ slaves were transported to the north. (a) 2,000 (b) 6,000 (c) 20,000 (d) 15,000​ Please now

c

Explanation:

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.  

taxation that is paid in kind, that is with goods or services rather than money