Which of the Following Statements Is Not Correct in Context

Which of the following statements is not correct in context of the North and South?

A) Northerners and Southerners invoked with nearly equal frequency the doctrine of states' rights against federal authority.
B) The geographical sizes of the North and South were different.
C) Urban growth was slower in the South than in the North.
D) Southerners spoke the same language and worshipped in the same Protestant fashion as Northerners.