The 3rd one is the correct answer
It was the world's longest humanmade structure at more than four thousand miles actually constructed from a series of smaller walls that were connected together built to guard against Mongol invaders.
Hope this helps. :D
During world war 2? They were started to get weaker when the Americans and Russians started in. Many of the high ranking Nazi went into hiding. They were struggling for a long time before they did.
Settlement houses were established so that it would help fight poverty. The settlement houses provided services such as daycare education and healthcare to improve the lives of the poor in these areas.
Delaware was the first state to ratify the Constitution
