题目内容：
根据以下内容，回答题。DOUBTS ON HEALTH BENEFITS' CLAIMS
Are health food bars really good for you? A recent analysis by Diet and Health magazine failed to find any benefits in health food bars. In fact many of the most popular bars proved to be positively unhealthy, with high levels of fats, sugar, salt, preservatives, and other chemicals plus an inordinate amount of packaging. Rather than substituting a health bar for your breakfast or lunch,consumers would be well-advised to skip them completely. A balanced diet of freshly-prepared food is still the best, apparently!
What is the main reason for writing this news? A．To alert the public about a new health product
B．To report the finding of a study conducted by a magazine
C．To correct false information printed in an earlier article
D．To suggest some food for a healthy breakfast
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