The last one and I'm pretty sure the second one
Ensuring C) domestic tranquility means ensuring peacefulness or calmness. Domestic tranquility refers to peace to peace at home. It can be applied to family as well as to states. When referring to states domestic tranquility refers to peace kept among states as set out in the Constitution. It includes the federal governments rights to end rebellions and smooth out tensions between states.
All German Americans were required to join military armed forces. To those who hadn't signed up, were imprisoned.
But apparently, in many sources, it states that German-Americans in both Germany and US, were imprisoned. Sad truth :(
"The Indian Reorganization Act improved the political, economic, and social conditions of American Indians in a number of ways: privatization was terminated; some of the land taken was returned and new land could be purchased with federal funds; a policy of tribal self-government was implemented; tribes were allowed to incorporate businesses and credit established to further such business; and education & employment opportunities were greatly enhanced"
Hope this helped :)