C is the answer as the fought off the British is defeated them.
They viewed the Battle of New Orleans as a great victory even though it came after the war officially ended.
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.
B settlers would determine whether a territory would have slavery
There were 20 disputed electoral votes from new states