The main reason it started back in 1945 was to stop another world war. It's predecessor the League of Nations had clearly failed, so whilst forming the UN they made up some new rules to make sure no country was punished so hard that another war would happen.
The UN we know keeps peace, Looks over the worlds children and fights for Human rights. Have a look at the website I have placed below, It's your World.
According to Spence, the Japanese troops unleashed on the defeated Chinese troops and harmed the civilians.
<u>Explanation:</u>
The Japanese troops entered the city on the thirteenth of December and harmed and unleashed on the Chinese troops which was the defeated troops. After entering the city, they harmed and troubled the civilians also including the females.
The female assault exploited people, a large number of whom kicked the bucket after rehashed attacks, were evaluated by outside eyewitnesses living in Nanjing at 20,000; the criminal troopers slaughtered were evaluated
at 30,000; killed regular citizens at 12,000. Other contemporary Chinese gauges were as much as multiple times higher (300,000) and it is hard to set up precise figures. Unquestionably burglary, wanton
pulverization, and fire related crime left a significant part of the city in ruins.
The answer is C) Completion of transcontinental railroad.
Hope this helps you
Answer: the Tigris and the Euphrates in Mesopotamia (modern Iraq); the River Nile in Egypt; the Indus River in India; and the Yellow and Blue rivers in China. That is why they are called river civilizations.