Answer:
A.TRUE
Step-by-step explanation:
The statement is true because under international trade, firms are able to take advantage of the lower costs of materials, labor, and other factors of production, thanks to international trade.
For example, if country A is good at producing paper, and country B is good at logging, firms from country A will import the pulp from country B at lower prices, and thus, will spend less in making the paper.
Also, when firms expand capacity, they benefit from economies of scale: the general reduction in average production costs as output capacity expands.