Which of the following statements about the United States in 1861 is FALSE? a.
The North had greater economic diversity and more jobs.
b.
The North often passed tariffs that benefited Northern manufacturing at the expense of the South.
c.
The South’s economy was dependent on agriculture, especially cotton.
d.
The South’s economic wealth was beginning to surpass the North’s economic wealth, which made Northerners want to eliminate slavery even more.

I know the answer but, since I can't answer my own question I'm writing it here,

The answer is - D