题目内容：
根据下面资料，回答题 Increasingly, over the past ten years, people-especially young people-have become awareof the need to change their eating habits, because much of the food they eat, particularly processedfood, is not good for the health. Consequently, there has been a growing interest in natural foods.Foods which do not contain chemical additives (添加剂 ) and which have not been affected bychemical fertilizers, widely used in farming today.
Natural foods, for example, are vegetables, fruit and grain which have been grown in soil thatis rich in organic(有机的) matter. In simple terms, this means that the soil has been nourished byunused vegetable matter, which provides it with essential vitamins and minerals. This in itself is anatural process compared with the use of chemicals and fertilizers, the main purpose of which is toincrease the amount-but not the quality-of foods grown in commercial farming areas.
Natural foods also include animals which have been allowed to feed and move freely in healthypastures(牧场). Compare this with what happens in the mass production of poultry: there arefarms, for example, where thousands of chickens live crowded together in one building and are fedon food which is little better than rubbish. Chickens kept in this way are not only tasteless as food,they also lay eggs which lack important vitamins.
There are other aspects of healthy eating which are now receiving increasing attention from experts on diet. Take, for example, the question of sugar. This is actually a non-essential food! Although a natural alternative, such as honey, can be used to sweeten food if it is necessary, we can
in fact do without it. It is not that sugar is harmful in itself. But it does seem to be addictive: thequantity we use has grown steadily over the last two centuries and in Britain today each person consumes an average of 200 pounds a year! Yet all it does is to provide us with energy, in the form ofcalories. There are no vitamins in it, no minerals and no fiber.
It is significant that nowadays fiber is considered to be an important part of a healthy diet. Inwhite bread, for example, the fiber has been removed. But it is present in unrefined flour and ofcourse in vegetables. It is interesting to note that in countries where the national diet contains largequantities of unrefined flour and vegetables, certain diseases are comparatively rare. Hence the emphasis is placed on the eating of whole meal bread and more vegetables by modem experts on"healthy eating".
People have become more interested in natural foods because______ A．they are more health conscious
B．they want to taste all kinds of foods
C．natural foods are more delicious than processed foods
D．they want to return to nature
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