Answer:
A. Airplane
Explanation:
Around 1918, Air delivery, became the new mode of transportation for mail, as it rendered railroad services unnecessary. During this period, the Post Office moved on the airplane bandwagon early, there by, offering air mail service in the early 1900s.
Hence, the 1900's technological invention which allowed the U.S. postal service to deliver the mail considerably faster than previous methods is AIRPLANE.
The middle class was different after the industrial revolution than it was before because prior to the Industrial Revolution, Europe had a small middle class. Following the Industrial Revolution, the middle class greatly grew.
After the industrial revolution, the lower classes were been able to "rise up" economically by getting new jobs in factories, thus much of the lower class entered the middle class.
Answer: Between 1940 and 1945, approximately 1.1 million Jews, Poles, Roma people, Soviet POWs and others were killed at the Auschwitz camps. Now, as Soviet troops marched westward through occupied Poland, the SS sought to dismantle their killing machine. The Red Army's arrival meant liberation, the camps' end.
Explanation:
d. it was to organize each state's government
