The incidence of heart disease in China is much lower than the incidence of heart disease in the United States. The rate of heart disease for Chinese people who immigrate to the United States approximates the higher rate of heart disease prevalent in the United States. However, most Chinese people continue to eat the same type of food that they ate in China after they immigrate to the United States. If the statements above are true, they provide the most support for which one of the following? ['The relatively low rate of heart disease in China is not due to the different food eaten by the Chinese people.', 'People in China have a lower rate of cancer than those in the United States, even Chinese Americans.', 'The stress of life in China is higher than the stress of life in the United States.', 'Chinese Americans are healthier than other Americans.']