In this study, researcher Sharon Fowler followed over 600 normal weight adults ages 25-64 over a seven to eight year period of time. She has a number of theories as to why weight gain may be a result of drinking a zero-calorie beverage:

　　1.Artificial sweeteners may affect your body’s ability to judge how many calories you consume. When no calories are consumed, the body may continue to crave(渴望) what it expected and could lead to overeating.

　　2.

　　Some people give up regular sodas to justify their favorite dessert and still take in too many calories. A regular soda contains about 150 calories while your dessert may be double that in calories easily.

　　3. For others who were gaining weight already, switching to diet soda wasn’t enough to stop the gain.

　　Since her first piece of research, Fowler has tracked another 2000 people with similar results. Do the faux sweet products induce people to want more sweets? Fowler suggests that perhaps it’s not the soft drinks themselves that cause weight gain but that there is some link between diet soda drinking and overweight.

　　64.Why do people give up regular soda and take diet one according to Fowler’s research?

　　A. Some want to gain weight.

　　B. Some want excuses to have dessert.

　　C. Some mistake diet soda as no-calorie drink.

　　D. Diet soda can help people lose weight.

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