How do trade agreements the countries involved? .
a. by restricting imports.
b. by accelerating production.
c. by expanding tax revenues.
d. by decreasing trade barriers.

D is the correct answer. Trade agreements are intended to boost trade and maximise the revenues generated by trading by decreasing barriers to trading between countries and, therefore, making easier for countries to spend exchanging money for services and goods.

Iwould say the answer would be b

Do you have options for this answer