9 Select the correct answer.
which best describes the way photographs are considered by historians?
A.
primary source documents that are useful in the study of history
CAB.
reliable sources for the study of history only if from a named source
C. secondary source documents that are useful in the study of history
unreliable sources for the study of history because they are too subjective
E.
useful sources for the study of personal histories, but not for general history
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