What is implied but NOT stated by the author is th

单项选择题

Generations of Americans have been brought up to believe that a good breakfast is one of life" s essentials. Eating breakfast at the start of the day, we have all been told, is as necessary as putting gasoline in the family car before starting a trip.
But for many people the thought that food is the first thing you have, in the morning is by no means a pleasure. So despite all the efforts, they still take no breakfast. Between 1977 and 1983, the latest years for which figures are available, the number of people who didn" t have breakfast increased by 33 percent—from 8.8 million to 11.7 million—according to the Chicago-based Market Research Corporation of America.
For those who feel pain or guilt (内疚) about not eating breakfast, however, there is some good news. Several studies in the last few years indicate that, for adults especially, there may be nothing wrong with omitting breakfast. "Going without breakfast does not affect performance." said Arnold E. Bender, former professor of nutrition (营养) at Queen Elizabeth College in London, "nor does giving people breakfast improve performance."
Scientific evidence linking breakfast to better health or better performance is surprisingly inadequate, and most of the recent work involves children, not adults. "The literature," says one researcher, Dr. Ernesto Pollitt at the University of Texas, "is poor."

What is implied but NOT stated by the author is that ______.

A．not eating breakfast might affect the health of children
B．breakfast does not affect performance
C．professor Bender once taught college courses in nutrition in London
D．people who don"t eat breakfast have increased