Contrary to the Old Assumption That New World Farming Originated

Contrary to the old assumption that New World farming originated in the upland areas,recent research suggests that

A) farming first originated in the tropical lowlands at about the same time food production arose in the Middle East-around 10,000 years ago-and that these new techniques developed in the tropics and then diffused into drier regions at higher elevations.
B) the upland communities borrowed farming techniques from their lowland neighbors.
C) farming originated in the coastal lowlands of Argentina and then diffused upward.
D) all food staples except maize were domesticated in the tropical lowlands.
E) all food staples except teosinte were domesticated in the South American jungle.