Answer:
north please tell me if I am wrong
Well.... The only GOOD thing to come out of the Atomic Bombs dropped on Japan was that it ended the war in the Pacific, and WWII as a whole.
After Germany surrendered on May 7th, 1945, the Japanese were frankly disgusted. They said that Germany should have fought to the last man and last bullet before laying down their arms. To the Japanese, to surrender willing was a cowardly disgrace, and was the reason for many of the kamikaze attacks on U.S. ships. It was also the reason why Japanese pilots carried pistols in their planes because if they were shot down and just so happened to survive, they needed to kill themselves instead of having the humiliation of being captured.
So, Japan made it very clear that unlike Germany, they would fight tooth and nail till the very end. At the time, the U.S. saw the Atomic Bomb as a cheaper alternative to losing men and equipment in a seemingly never-ending battle against the Japanese Empire.
Well in this period, it is considered the old stone age and for good reason, as this era is characterized by the use of rudimentary chipped stone tools. Basically it was the era when human started using tools that were made from stone. Or in other words, innovated.
I’d go with C. Jazz and the dance “The Charleston” were big and new in the 1920s.
Not A, because The Great War, World War I, ended in 1918.
Not B, because the Panama Canal was built from 1904 to 1914.
Regarding D: Telegraphs were sent from the 1840s-1977. If the question is supposed to have more than one answer, this would be a good second answer. But if the question has only one answer, go with C.