The Civil War had a significant impact on farmers in South Carolina, particularly in relation to the economic and social changes that occurred after the war. Among the options provided, the most accurate impact would be:
B Plantations grew larger after the Civil War as land was available.
After the war, many plantations that had previously depended on enslaved labor were either abandoned or available for purchase, and some land was consolidated into larger farms, particularly as the agricultural economy transitioned during the Reconstruction era. This consolidation was partly due to the economic upheaval that the war caused, as well as changes in labor dynamics.
While options A, C, and D do reflect certain aspects of the agricultural landscape during that time, option B most directly addresses the trend of land consolidation that occurred post-Civil War in South Carolina.