B. <span>a shield of missiles over the U.S. designed to shoot down incoming nuclear missiles from the USSR</span>
There were actually four HUGE causes for WW1, treaties and alliances brought many countries into war, the imperialism of some countries scared other countries, and they were "defending" themselves, there was a lot of weapons stocking, and countries were creating gigantic armies, and that threatened other countries, and then we have plain old nationalism.
I can't help you if you don't give me the documents.
Stalin helped Lenin escape from the authorities in order not to get captured
