Either communist oppression or Germany's strength. I'm not sure.
The answer is the society.
Economics is focused on the problem of the society which is created by a world with limited resources and people with unlimited needs and wants.
8) Chinese crawfish since it is cheaper.
9) The opportunity cost is Louisiana crawfish because it would struggle due to it's expensive price. The trade off would be the Chinese crawfish.
10) Price is not the only factor. Some customers may like Louisiana crawfish, and others may like Chinese.
11) The demand of the Louisiana crawfish would decrease while the chinese increased
