[单项选择]

Trying to get Americans to eat a healthy diet is a frustrating business. Even the best-designed public-health campaigns cannot seem to compete with the tempting flavors of the snack-food and fast-food industries and their fat-and sugar-laden products. The results are apparent on a walk down any American street—more than 60% of Americans are overweight, and a full quarter of them are overweight to the point of obesity.
Now, health advocates say, an ill-conceived redesign-has taken one of the more successful public-health campaigns--the Food Guide Pyramid--and rendered it confusing to the point of uselessness. Some of these critics worry that America’ s Department of Agriculture caved to pressure from parts of the food industry anxious to protect theft products.
The Food Guide Pyramid was a graphic which emphasizes that a healthy diet is built on a base of gains, vegetables and fruits, followed by ever-decreasing amounts of dairy products, meat, sweets a
A. public-health campaigns cannot compete with tempting flavors.
B. snack-food and fast-food industries are flourishing in the US.
C. most food in America are profoundly rich in fat and sugar.
D. fat people account for a large proportion of American population.