Current Research on the Productivity of Southern Cotton Plantations Shows

Current research on the productivity of southern cotton plantations shows that

A) output per unit of input was greater on large slave plantations than on small free-family farms.
B) the majority of the South's cotton crop was grown on farm units of less than 100 acres.
C) output per slave declined during the antebellum period.
D) plantation-style agriculture was inefficient.
E) All of the above.