I think that maybe people are saying different answers because there might have been many such laws. I will mention one example: the Diversity Visa Immigration: it means that people from Eastern Europe have a higher change of obtaining a visa due to a smaller population in the US than the western European Countries.
The correct answer is b and d
To balance both the interests of large states and small states.
Explanation:
Favorable balance of trade is a positive situation where a country exports more goods and services than what it imports. It is an economic term that refers to the existence of a surplus in the nation's balance of trade.