Answer:
c. An enhanced flow of ideas
Explanation:
Enhanced flow of ideas often lead to innovation, which would eventually lead to various creations that increase the production efficiency.
When conducting free trades, people from less-industrialized country can learn from conducting business with people from a more industrialized country. For example, they can learn the type of machines used for production,the marketing method that is used to reach customers, the most efficient way to distribute your product, etc.
After learning all this, the people form less industrialized nation could implement the knowledge in the home country. This is one way they can improve their economy and strengthen their position in on the international level.