I suppose the C is right, because at that time,Spain and Portugal take advantage of slave and cane to be rich, they buy the black people from African to plant sugar cane.
There exists the same question from other source with the following choices:
<span>A: Many southerners depended too heavily on industry.
B: After the civil war, many southerners struggles financially.
C: The civil war and reconstruction had little effect on the south.
D: Southerners needed to focus more on cotton production
The correct answer to this question is letter "</span>A: Many southerners depended too heavily on industry."
