Answer:
B) increasing demand for similar products.
Explanation:
Globalization and the internet shrunk the world, before when someone was talking about happened in other continents it generally didn't affect us. Now what happens in China or India affects the US, Europe and most of the world. Total demand for goods has increased dramatically, as well as the total number of suppliers. It is normal to find products on a Walmart that come from countries that you don't even know they exist, or you cannot find in a map.
That combination of greater demand and competition makes many corporations look for places to manufacture goods at the lowest possible cost, because if they don't, someone else will. Very few industries can survive solely based on quality, they must also offer competitive prices.
Another thing that affects the production of goods is that you can now find similar products almost anywhere you go. If you are not old enough to have experienced how countries have changed in the last 10-20 years, ask your parents or any other older people that likes to travel how hard it was to find American products or brands in Europe or South America. In Asia or Africa it was virtually impossible to find them, but now everything has changed.