Polyphony began and musical rules changed
The tritone is argued as a musical interval composed of three adjacent whole tones. It is often defined as an interval spanning six semitones. it led to the disregard of traditional tonality.
The American Civil War became known as the first modern was because it was the first war to ever use modern weapons. While other wars such as the American Revolutionary War used gunpowder, the American Civil War used weapons such as the Gatlin Gun, used by General Custer, repeater rifles and pistols, and grenades.
Government (a) is the correct answer, also they also provided some education as well
Japan-united states hope it helps :)
Option B is the right answer that the Navajo sent messages to prove that the code worked.
Navajo code talkers in the 20th century were the people who used the coded language as the method of their communication during wartime. Using their Native language, the Navajo Code Talkers developed a confidential military code which gave assistance to the United States to achieve success in the Pacific during World War II.
Navajo code talkers tested their code by sending messages so as to ensure that the code can be decoded by the receiver or not.
