<span>artifacts found at historical sites
letters written during that period in history
documents with information about the past</span><span>
</span>
I believe the answer is D: <span>the treatment of slaves by their owners
Hope I helped! :)</span>
Answer:
Zoroastrianism made state religion under the Sassanian Empire.
Explantion; Jewish, Christianity and Muslim religion all have a similar doctrine. They all are monotheistic and worship the same God. The difference between Jewish and Christianity is that Jewish people do not believe that Jesus Christ is the Messiah and are still waiting for the coming of the savior.