Prior to World War II, Pima Indians Had Normal Rates

Prior to World War II, Pima Indians had normal rates of obesity and diabetes in their culture, but as their culture changed and they adopted a more Westernized diet and lifestyle, the rates of these two problems dramatically increased, demonstrating ________.

A) how environmental and personality factors can interact to produce obesity
B) how the environment can interact with genetics to determine obesity
C) how access to medical assistance might determine obesity
D) the power of genetic factors in determining obesity