The correct answer is - D. how to make iron.
The Zhou dynasty was one of the greatest dynasties of China, and among many achievements of their reign, the artisans of this dynasty managed to learn how to make iron. This was revolutionary for the Chinese people, and it was of great use in the agriculture after the tools for it started to come in iron version, and it made everything much easier, quicker, and more efficient.
The US did not want Soviet communism to spread.
Tokugawa Ieyasu was the first shogun of the Tokugawa era, also known as the Edo period which lasted from 1603-1867. In terms of politics, the goal of the Tokugawa were to remove any threats that could lead to potential rebellion. The political rule of the Tokugawa was closest to authoritarian. Regarding the social changes, the Tokugawa policies lead to economic growth which disrupted the status hierarchy in their previous four class system. The population of commoners became more wealthy, improved their education and began to gain more status. This resulted in the samurai class to continuously decrease economically.
The correct answer is <span>Frequent changes in leaders so it was hard to have stability
Leaders changed all the time as well as parties who only wanted power and not to help their countries. They were using the situation to get political power. This led to a rise in economic problems and things like unemployment and other various problems that made people unhappy and made the period turbulent.</span>
