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.
Im pretty sure its b. establish an international organization dedicated to peaceful resolutions of conflicts
The answer is 32/7 I hope this helps
<u>Opinion on the statement "Antagonism arose among the conquered nomadic tribes of the Xiongnu":</u>
The Xiongnu made civil war in monastic nomadic existence in the second and third decades B.C.E. when they created a much more unified and patriarchal democratic system than for the monastic societies of the old days.
By the 1960s, it became evident that, amid irregular antagonism, farm workers and portable agriculturalists were involved in a mutually beneficial relationship. Moreover, groups keep switching between nomadism and sedentism, based in part on the strength of the centralized authority.
In the 1970s, Rowton used the terminology "attached nomadism" and "genetically determined chiefdom" to show the type of social structure distinctive of old Mari, "which reflects a curious mixture of town-state, clan, and nomadism”.
In the coming years, archaeologists, astrologists, and scholars extended this deeper understanding of nomadic revivals to physically active society to the study of the origins of advanced monastic nomadism.
