Can u guys tell me which ones are primary or secondary source i need

Which battle was one of the most devastating for

How does wards description of the roman government compare to polybius description in sorce 1 and millars description in source 2

Plz which of the following statements about life in europe during the middle ages is not accurate. a. by the middle ages the only unifying factor in europe was christianity. b. most people lived in rural areas and worked on farms. c. priest, monks and church officials were virtually the only people in europe who could read and write d. most people lived in cities or towns and worked as skilled artis most people lived in cities or towns and worked as skilled artisans.