I believe the correct answer is B because the comma after 1968 isn't needed.
Okay! What do you need help with?!?
(I took this from ahsan57900)
1. The governments and economies of foreign nations greatly influenced the United States of America because the products produced by foreign nations compete with the American products in the market. This competition causes negative effects on the economy of United States when more products of foreign countries are sold as compared to American products due to lower prices of foreign nations products.
2. Big challenges are created by nontraditional economies, natural disasters, and emerging democracies on the United States government because these factors lowers the production and sale of American products in the market that affected the economy.
