Prior to world war i, tensions in the balkans were most related to which main cause of the war?

Which statement supporting restrictions on guns aligns with the supreme court's decision in a 1939 case? a. citizens should be required to have extensive training before they can own guns. b. gun control is needed to protect public safety, regardless of what the second amendment says. c. americans should not be able to keep guns in their homes. d. people should not be allowed to carry certain types of guns across state lines.

Which factor has played the most important role in changing the way history is studied over time?

Explain how social darwinism impact imperialism.