Which two concerns regarding weapons of mass destruction does the National Nuclear Security Administration deal with in collaboration with the United Nations? the misuse of weapons of mass destruction by rogue nations terrorists obtaining weapons of mass destruction advances in weapons of mass destruction by Russia nuclear testing by China maintenance of weapons of mass destruction in Europe

Explanation:

The correct answers are the following:

C) advances in weapons of mass destruction by Russia;

D) nuclear testing by China.

The main problem of weapons of mass destruction in Russia is the fact that they are not kept in total security, as it is claimed by many. The UN lacks access to many such sites in Russia, which certainly is a serios issue.

As for the relations with China, this cooperation is essential for both countries, however Chinese representatives highlight the importance of trust, which they believe is not quite present between the two countries.

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

answer; the mayans and