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

Verified Answer :

I think it would be C.

Answer:

C. An essay about China's first emperor written by a university professor

Explanation:

A university professor's research and analysis is more credible than;  


A bronze plow discovered in the ruins of an ancient Chinese city

A chart created in ancient China to track a city's growing population

An announcement written for an early Chinese emperor to deliver to his subjects