The Ming and Qing dynasties followed which of the following policies regarding foreign trade?
a.
They restricted foreign trade.
b.
They encouraged foreign trade.
c.
They allowed foreign trade in all of China’s coastal cities.
d.
They forbade foreign trade entirely.

a. They restricted foreign trade

Explanation:

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation:

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."