A historian is interested to learn whether a new biography about a Roman emperor is likely to be biased. Which piece of information would be helpful to
her?
A. A photograph showing the ruins of the emperor's enormous
palace
B. A letter from the book's writer discussing how much he hates the
emperor
O C. A Roman primary source describing the emperor as arrogant and
unkind
O D. A secondary source that describes the emperor as somewhat
incompetent