What were the plants in the mesozic era?

Plants in the Mesozoic Era included, redwoods, pines, yews, the monkey puzzle tree, cypress, and cycads. 

What a country must have in order for it to specialize its production is an INTERNATIONAL DIVISION OF LABOR. The answer to this would be option A. Once labor is being divided internationally, the results would also be positive and very productive since the tasks being done are simultaneously done. Hope this helps.