CACOPHONOUS:（）

A．Rain forests have always possessed insufficient quantities of carbohydrate-rich resources to support foragers without the aid of agriculturalists.
B．The difficulty of raising carbohydrate-rich plant species in certain areas of the rain forest may have led to the arrest of those species' co-evolution.
C．Trade relationships between agriculturalists and foragers may have been the cause of the disappearance of certain carbohydrate-rich plant species, not vice-versa.
D．Foragers may have been willing to trade carbohydrate-rich plants in exchange for the more nutritious food products of agriculturalists.
E．Environmental changes in rain forest composition may have led to the loss of certain foraging techniques.

A．inform the reader of the potential cause of certain changes in rain forest composition
B．suggest that foragers may have developed agricultural practices, then abandoned them in order to focus on more specialized food-gathering practices
C．explain why certain food gathering practices may be less efficient sources of carbohydrates than others
D．introduce new evidence for the interdependence between agriculturalists and foragers in the rain forest economy
E．suggest that certain rain forest food products are healthier than others, though more difficult to obtain through foraging