D. Potential employment is the factor that pulled immigrants to the United States. In their mother countries, they couldn't find any job, which is why they moved to the US in order to make a living.
He put into place a dictatorship
The best option from the list would be "<span>a series of failed economic programs," since it was operating under a "command economy"--meaning that government had to "guess" supply and demand. </span>
Well, it is like the Biblical story about the Tower of Babylon - in the beginning, there was only one language and all the people in the world spoke it. However, because of many disputes and quarrels, they all separated and created numerous new languages. The same thing happened in the real world (if you don't believe in what the Bible says) - there used to be Proto-Indo-European language, but over time, it developed many new languages as people grew apart and created new nations.
