Answer:
Let's say that that Daniel has work on the same day his friends want to see a movie.If Daniel misses out on the movie the oppertunity cost will be missing out on the movie to go work.If Daniel skips work, the opportunity cost will be the wages lost from work.
Explanation:
The effect climate would have to D Elevation. Have a nice day ^^
There is enough evidence to support it.
It was positive because slaves could pick the cotton much faster that way, and it increased the availability of cotton for sale and for things like clothes because the cotton gin got it done so much faster