阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
Whenever we turn on the TV or radio, read the newspapers, surf the Internet, we'll be surrounded by the word "diet" everywhere. We have so easily been attracted by the promise of diet products that we have stopped thinking about what diet products are doing to us. We are paying for products that harm us psychologically（心理上地）and physically.
It's obvious that diet products weaken us psychologically. They allow us to jump over the thinking stage that our weight problems lie not in actually losing the weight, but in controlling the consumption of fat. All we have to do is to swallow or recognize the word "diet" in food labels.
What's more, diet products have greater psychological effects. Every time we have a zero-calorie drink, we are telling ourselves that we don't have to work to get results．Diet products make people believe that gain comes without pain, and that life can be without resistance and struggle.
