The action lowered morale. this did not lower morale as many common folk did not understand the need for ports and thought themselves self sufficient.
The answer is true Hope this helps
Basically their goal was to defend the nations members from threats from the communist enemies/countries.
Like for example, France and the US would be in the United Nations/NATO and Russia and China would be the communists.
NATO is the North Atlantic Treaty Alliance between North America and Europe.
I believe rice became a Chinese Staple food during the Tang dynasty because new types of rice and new growing techniques yielded bigger harvests. Hope that helped.