The following factors were necessary preconditions for the cotton boom of the 1830s except: a) the general expulsion of Native Americans from the U.S. South. O b) new varieties of cotton better suited to the southern climate and soil. c) inexpensive barbwire fencing that allowed planters to mark off their land. Od) inexpensive farmland with investors on both sides of the Atlantic ready to fund plantations.

The following factors were necessary preconditions for the cotton boom of the 1830s except: a) the general expulsion of Native Americans from the U.S. South. O b) new varieties of cotton better suited to the southern climate and soil. c) inexpensive barbwire fencing that allowed planters to mark off their land. Od) inexpensive farmland with investors on both sides of the Atlantic ready to fund plantations.