I think it's D) Because I know they had to make sacrifices..
By sending spies to the USSR to copy their plans for sputnik
Democratic government get their power from the people.
Hitler's final solution to the "Jewish problem" was extermination. Those who were stronger were sent to labor camps to work until they were deemed "unworthy". Those who were deemed "unworthy" in the beginning and later on, were sent to extermination camps, where they were gassed and then were sent to the crematorium, and then buried in mass graves.
hope this helps
