Which of the Following Describes What Happened to the Economy

Which of the following describes what happened to the economy of the South after the Civil War?

A) The South,with the aid of new capital investment,public and private,became industrialized two decades after the Civil War.
B) The transcontinental railroads that were completed in the 1860s,1870s,and 1880s played a key role in the industrialization of the South in the 1880s and 1890s.
C) The South remained the poorest region in the country until the growth of the Sun Belt took off in the 1960s.
D) The South remained a largely agricultural section of the economy until the 21st century.