Modern Researchers Using Cultural Artifacts Such as Written Records,letters and Diaries

Modern researchers using cultural artifacts such as written records,letters and diaries for historical research are concerned that such records

A) over represent the poor because wealthier subjects were better able to protect their privacy through legal restrictions on access to the artifacts.
B) over represent the more privileged who were literate and whose artifacts were saved.
C) may not provide a reliable,accurate examination of real lives because writers often embellished the truth.
D) do not allow generalizability because they are incomplete.