The answer for this question is C. The Domino Theory. This theory states that if a country came under communist rule, its neighboring countries and regions would follow as well. This theory is what the US used as a reason to intervene in the different affairs of various countries to stop or prevent communism from spreading.
Answer: A tariff
Explanation: America buys goods from china to be brought over to the us
The answer is effective leader. As individuals have sought after a comprehension of what makes a powerful pioneer, their consideration has frequently moved to the key individual qualities those pioneers display. The thought is that distinguishing those normal attributes will enable organizations to recognize successful pioneers and enable people to know how to end up better pioneers. Example of these traits are extraversion, knowledge of the business, desire to lead, and open-mindedness are some just to name a few.