The food we eat seems to have profound effects on our health. Although science has made enormous steps in food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that 40 percent of cancer is related to the diet as well, especially cancer of the colon (结肠). Different cultures are more prone to get certain illnesses because of the food that is characteristic in these cultures. That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates (硝酸) and nitrites (亚硝酸盐), commonly used to preserve color in meats, and other food additives (添加剂), caused cancer. Yet these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives that we eat are not all so direct. Farmers often give penicillin(盘尼西林) to beef and poultry(家禽), and because of this, penicillin has been found in the milk of treated cows. Sometimes similar drags are administered to animals not for medicinal purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue.The FDA has tried repeatedly to control（）

A．the attempt to fatten the animals
B．the attempt to cure sick animals
C．the using of drugs to animals
D．the using of additives to preserve the color of food

The food we eat seems to have profound effects on our health. Although science has made enormous steps in food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that 40 percent of cancer is related to the diet as well, especially cancer of the colon (结肠). Different cultures are more prone to get certain illnesses because of the food that is characteristic in these cultures. That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates (硝酸) and nitrites (亚硝酸盐), commonly used to preserve color in meats, and other food additives (添加剂), caused cancer. Yet these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives that we eat are not all so direct. Farmers often give penicillin(盘尼西林) to beef and poultry(家禽), and because of this, penicillin has been found in the milk of treated cows. Sometimes similar drags are administered to animals not for medicinal purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue.

题目标签：硝酸盐亚硝酸添加剂