Increasing trade can increase productivity by encouraging exporter of services?

Trade improves productivity in three important ways. First, imports expose domestic firms to greater competitive pressure, while giving them access to more and better inputs. Second, exporters increase productivity by learning from overseas customers and through exposure to competition from foreign producers.

Explanation:

the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.

(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.