During the age of industrialization, the South...
A. took full advantage of the new economic trends
B. received preferential treatment from the railroads
C. turned away from agriculture
D. held to its Old South ideology
E. remained overwhelmingly rural and agricultural
Of the choices given here, the best is E. A case can be made for D, depending on what you call the "Old South ideology," but since E is clearly true, that is the best answer.
If we see white supremacy as the ideology of the Old South, then D is clearly true because the South during the late 1800s was still a very racist area. However, E is clearly true. The South did make some moves towards industrialization. However, those moves did not change the nature of the South. As the link below tells us, in 1890 only 10% of the population of the South was urban, with most of the rest making its living by agriculture.