Answer:
Constitution Day commemorates the signing of the U.S. Constitution on September 17, 1787 by the delegates to the Constitutional Convention in Philadelphia. Publicly funded educational institutions and federal agencies celebrate the day by providing educational programming about the history of the Constitution.
Explanation:
C. Building Up Armed Forces
The tariffs, sanctions, and quotas all have limiting roles in the global economy. They are all methods through which the trade is limited, or even stopped, be it for only some goods, or for all. There's numerous examples around the world for their usage, and the purposes vary from protection of the domestic companies, to punishing some country for its actions. We can take the increase of the tariffs of the USA toward China's goods as an example, China's quotas on the foreign movies because of the social influence, or the sanctions toward North Korea because of its politics.
This depends greatly upon the timeframe to which you're referring, but generally speaking, no, Chinese leaders were not eager to interact with societies outside of China, since they had very little need to trade with outside nations for many years.