问题:
[单选题]
阅读材料回答52-55Health care experts have long drawn attention to the problems of eating too much salt. There is strong evidence that a diet high in salt can lead to raised blood pressure.Since high blood p
A.
To improve the flavor of food.
B.
To decrease the time for processing food.
C.
To extend the shelf-life of food.
D.
To protect people against heart diseases.
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