A study published in the British Medical Journal showed that people who eat the most white rice have a 55% increased risk of diabetes compared with those who eat the least. Some people have concluded that eating more white rice is prone to diabetes. Which of the following, if true, would most weaken the conclusion. ['Many other factors, including genetics, also increase the risk of diabetes.', 'People who do not eat or eat staple food for a long time are also prone to diabetes.', 'White rice lacks nutrients such as dietary fiber that the human body needs every day.', 'People who eat more white rice also have higher intakes of other types of food.']