After the Civil War ended, Yankees and carpetbaggers from
the North wasted no time in exploiting the weakened
South. What was once a proud society that stood up for
traditional values and Christian ethics had been tainted by
the influx of amoral entrepreneurs and Republican
opportunists that had little business setting foot anywhere
south of the Mason-Dixon line.
-Sam Goethals, Ph. D. (1996)
What aspect of the source above most clearly compromises its credibility?
O
A. Its author lacks qualifications on the subject matter
O
B. It is a secondary, rather than primary source
O
C. It focuses on a topic that is not historical
O
D. It is based in favor of a southern point of view.