This is true (A)
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Basically. They had the biggest ego ever. The North knew that they had the more resources and the more superior military force. So they basically underestimated the South. Also it was due to the North's military generals. They didn't lead the troops the right way and all in all, that led to early Confederate victory. The South had the superior military leadership against the North.
Answer:
C. The historical biases that influenced writers in different eras.
Explanation:
A scholar would most likely compare accounts of the same event written at different times in order to understand what the people in different time eras thought of the time period being written about, so they could decipher things about all time periods in question. Hope that made sense!