As medical evidence mounts that we are indeed what we eat, consuming a healthier diet has become almost a national passion in th

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问题 As medical evidence mounts that we are indeed what we eat, consuming a healthier diet has become almost a national passion in the United States. The food-for-fitness phenomenon began in the late 70s when a U.S. Senate committee on nutrition reached grim conclusion that six out of the ten leading causes of death—such as heart disease, cancer, and stroke—might be linked to diet. The government issued dietary guidelines advising Americans to eat a variety of foods, maintain proper weight, and limit intake of fat, salt, sugar, and alcohol.
For most Americans, what to eat is a matter of personal choice, rather than one of supply. An excellent nationwide food distribution system assures that fresh produce is readily available in all parts of the country, regardless of the season. Taking advantage of this abundance, many people are forsaking traditional meat-and-potatoes and in favor of lighter meals of salads, fruits, and vegetables.
The single most dramatic change in the American diet has been a reduction in consumption of animal fat, which is thought to increase the risk of heart disease and may contribute to the high U.S. incidence of breast and colon cancer. Margarine and vegetable oils have replace butter and lard in many homes, and half of all milk now drunk in the United States is low-fat. Fish and poultry are increasingly popular sources of protein as consumption of red meat declines. The food industry has responded to concern about fat by producing leaner cuts of meat and cholesterol-free substitutes for eggs.
One of the most significant trends in the American way of eating is the healthful change in restaurant food. "One of every two meals in the United States is eaten outside the home," says Donna Watson, President of the American Dietetic Association. "Restaurants are making special efforts to provide low-fat, low-salt, and low-calorie items." Salad bars, loaded with fresh greens and raw fruits and vegetables, are found everywhere, even along-side the burgers and French fries in fast-food restaurants.
Most important, the focus on prudent diet has led to an unprecedented national quest for a healthier life style. Americans are smoking less, exercising more, and experimenting with new ways to conquer stress. Eating sensibly, they have discovered, is only one important route to good health.
Many Americans no longer maintain the meat-and-potatoes diet because _____.

选项 A、salads, fruits, and vegetables are more easily prepared
B、there is a rich supply of diverse foods
C、such diet is not as healthy as salads, fruits and vegetables
D、diverse foods vary with seasons

答案B

解析第2段最后一句开头的Taking advantage of表明该分词结构和该句的主句形成了因果关系，这就是本题考查点，因此本题的答案就是该句分词结构中的this abundance，结合该段第2句可以知道this abundance的所指与B的内容是一致的。

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As medical evidence mounts that we are indeed what we eat, consuming a healthier diet has become almost a national passion in th

大学英语四级

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