Researchers have noticed that people whose blood shows abnormally low levels of calcium usually have laryngeal polyps, which can permanently damage vocal cords and result in partial or even total loss of voice. In order to prevent the polyps, the researchers recommend a diet high in calcium-rich foods such as dairy and green, leafy vegetables. Which of the following, if true, most strongly suggests that it would not be advisable to follow the researchers-
A. ক Dairy contains compounds that are difficult for many people to digest.
B. খ Laryngeal polyps sometimes disappear without treatment.
C. গ Laryngeal polyps cause a change in body chemistry that blocks the absorption of calcium.
D. ঘ Fresh vegetables are not always available in all seasons.
