The more cholesterol and fat a person ingests from his diet, the higher his serum cholesterol index. There is a limit within which the two are directly proportional. Beyond this limit, even if the cholesterol and fat intake With a sharp increase, the serum cholesterol index will only increase slowly. This limit is the same for all races, about European average cholesterol and fat intake. Which of the following options is available:. ["China's per capita cholesterol and fat intake are European, but China's per capita serum cholesterol index may not be equal to that of Europeans.", 'If the intake of cholesterol and fat is controlled within the above limits, the normal serum cholesterol index can be ensured.', 'The above limits can be reduced by reducing cholesterol and fat intake.', 'Europeans have serum cholesterol levels above normal.']