On several occasions, Ghazan Khan* went to the observatory at Maragha** and watched the Muslim, Christian, and Chinese astronomers make their observations. He looked at all the operations and instruments, studied them, and asked about their procedures, which he understood in spite of their difficulty. He also ordered the construction of a dome in order to investigate the Sun’s motion and he spoke out with his astronomers about it. All of them said that although they had

Ahistorian has discovered a letter written by an early roman emperor. she translates the letter and discovers that it contains orders to a general before a battle. she works to determine when the letter was written to figure out which battle the letter references.the historian in the passage is most clearly demonstrating which historical thinking skill? a. identifying causes and historical contextb. thinking chronologicallyc. making and evaluating arguments and interpretationsd. analyzing historical sources