Zipster is a local manufacturer of athletic shoes. Zipster has decided it wants to expand to global markets and to offer a larger selection of items. It plans to offer not just athletic shoes but also luggage and car accessories. Zipster is engaging in .

Which of the following best explains how trade enables greater specialization among producers? a. trade diversifies the market by bringing specialized goods from around the world. b. trade requires distribution networks and adds one more step to the production process. c. trade enables producers to open up new markets for their goods and services. d. trade allows people to focus on one kind of production and trade for their other needs.