A．Controlling one's calorie intake is more important than doing exercise.
B．Even occasional exercise can help reduce weight.
C．Weight reduction is impossible without exercise.
D．One could lose ten pounds in a year's time if there's no increase in food intake.

A．They tend to exaggerate the healthful effect of "light" beer.
B．They usually ignore the effect of exercise on losing weight.
C．They prefer "light" beer and low-calorie bread to other drinks and food.
D．They know the factors that play a positive role in keeping down body weight.