Which of the following items could serve as a secondary source for a historian studying early Chinese history?
AA bronze plow discovered in the ruins of an ancient Chinese city
BA chart created in ancient China to track a city's growing population
CAn essay about China's first emperor written by a university professor
DAn announcement written for an early Chinese emperor to deliver to his subjects
AA bronze plow discovered in the ruins of an ancient Chinese city
BA chart created in ancient China to track a city's growing population
CAn essay about China's first emperor written by a university professor
DAn announcement written for an early Chinese emperor to deliver to his subjects