Answer: B. an import quota
Explanation:
An import quota is known to be a form of trade restriction which the government of a country imposes on a particular good from another country. The government place or put a limit on the number of imported goods which can be imported into the country over a specified period of time. Thus, the government imposes this in order to encourage local production of goods and services by making the prices of imported goods high and prices of local goods low.
State is a nation or territory considered as an organized political community under one government.
Any four types of constitution are:-
1. Federal and Unitary constitution
2. Political and Legal constitution
3. Presidental and Parliamentary constitution
4. Monarchical and Republican constitution
I think global warming I'm not sure