What is an example of a primary source a historian might use in a study of the negative effects of the Mongolian Empire on Europe? (1 point)
a textbook narrative about the tactics of Mongol leader Ögedei Khan
the eyewitness account of the destruction of Kiev by Giovanni da Pian del Carpine in 1246
The Travels of Marco Polo, written by Marco Polo in 1300 CE
the 1630 painting The Battle of Legnica by Matthäus Merian the Elder