Which of the following is an uncontrollable external variable that could most likely cause China Mobile to think about building a manufacturing plant in the United States (a BIG decision) instead of continuing to export communications technology from China?

A. a growing trend in the United States to "Buy American brands"

B. the low-cost success of other foreign companies in manufacturing technology in the USA

C. a short-term decline in the value of the U.S. dollar relative to the Yuan

D. President Trump's decision to impose embargoes (1-luawei) and tariffs on Chinese technology

E. a newly-patented American method of assembling technology filed at the US Office of Patents and Copyrights