The army was segregated before the Tuskegee Airmen were formed
Social Darwinism most heavily affected the US government's relationship to big business during the late 1800s, coined by Mark Twain as "the Gilded Age." The theory affected this relationship by convincing (or allowing politicians to convince themselves) that only the strongest will survive and thus the government operated under a <em>laissez-faire </em>system (French for "hands off"). The government felt it should not regulate or weigh in on business issues and instead let businesses conduct affairs amongst themselves; however, this led to the creation of large monopolies, the formation of a moneyed elite still with us today, and the creation of the now huge wealth gap between the richest and poorest Americans.
Celsius, people in Europe would use Celsius
I'd go with d, Americans were indifferent I had that question on a test so it should be right and if you are having trouble with other courses I'd be obliged to help you.
Hope this helps.