A historian wants to learn more about the economics of an ancient civilization. Which of the following items would provide the historian more clues about the civilization's economy? a finding ancient writings, such as symbols and pictures, that are carved on old stones
b discovering tools, such as knives and arrows, that show the people's skill with metal
c uncovering several coins in a region where early human remains are found
d locating documents that include the laws of the ancient people in a region