Final answer:
Slaves were valuable property in Roman society because of the belief that birth, misfortune, or war led to slavery. Slavery was not restricted to a specific ethnicity or race. Slaves were obtained through war or purchase.
Step-by-step explanation:
The correct answer is A) Roman society. In Roman society, slaves were considered valuable pieces of property. Slavery in Rome was not limited to any particular ethnicity or race, but rather seen as a result of birth, misfortune, or war. Slaves played a significant role in the Roman economy and were often captured in war or purchased from defeated armies.