PART B: Which quote from the text best supports the answer to Part A?

A
“The North had an enormous industrial advantage as well.” ( Paragraph 3)
B
“The South’s greatest strength lay in the fact that it was fighting on the defensive in its own territory.” ( Paragraph 7)
C
“The South was fighting to maintain its way of life, whereas the North was fighting to maintain a union.” ( Paragraph 9)
D
“When the war began, many key questions were still unanswered.” ( Paragraph 10)