Declaration of Independence
3,Nixon was impeached, so was Johnson, Clinton was tried in senate<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.
Option D is the correct one, Woman's suffrage and the rights of African Americans <span />