Unsung Heroes refers to the people in world war ii that never got the acknowledgement that they deserve for their important services during the war. One of the unsung heroes were the group that created the Navajo codes for US military to communicate with one another.
The codes were managed to intercepted by Japan, but due to the complexity of the Navajo codes which was made by native language prevented japan from deciphering it.
The right answer for the question that is being asked and shown above is that: "B. the Russian Empire" Between 1870 and 1900, a number of new nations were created from <span>B. the Russian Empire</span>
