What 1900's technological invention

allowed the U. S. postal service to deliver

the mail considerably faster than

previous methods?

A. airplane

B. subway train

C. steam ship

D. pony express

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.

during world war ii, the united states officially had no propaganda, but the roosevelt government used means to circumvent this official line. one such propaganda tool was the publicly owned but government-funded writers' war board (wwb).

explanation:

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