Answer:
pigeons were used as carriers of messages during the late 19th century.
so that is why pigeons are successful
I think it C about Dr. King words still call on ....
The Mongols' reign over China was called the Yuan Dynasty.
The Triple Entente describes the informal understanding between the Russian Empire, the French Third Republic and Great Britain. It built upon the Franco-Russian Alliance of 1894, the Entente Cordiale of 1904 between Paris and London, and the Anglo-Russian Entente of 1907.
Hope this helps
D. threatened to use nuclear weapons on the communist