Answer:
Mental illness itself occurs from the interaction of multiple genes and other factors -- such as stress, abuse, or a traumatic event -- which can influence, or trigger, an illness in a person who has an inherited susceptibility to it
Explanation:
Well without a description om shooting in the dark. But id assume that the answer is Trench Warfare. Since A- was around since contact with Native Americans and largely popular in North America. B- Only was used and discovered in WW2. And C- was used but was largely frowned upon and condemned by both sides.<span />
My guess is A. <span>European countries were paying people to go to America</span>
Answer: American Indian Wars Black Hawk War Mexican-American War Battle of Monterrey Battle of Buena Vista ( WIA )