The main ingredient in every bottle of Dr. John's Milk of Magnesia is used by nine out of ten hospitals across the country as an antacid and laxative

If this advertising claim is true, which of the following statements must also be true ?

I. Nine out of ten hospitals across the country use Dr. John's Milk of Magnesia for some ailments
II. Only one out of ten hospitals in the country does not treat acid indigestion and constipation
III. Only one out of ten hospitals across the country does not recommend Dr. John's Milk of Magnesia for patients who need a milk of Magnesia

A. I only
B. II only
C. I and III only
D. I, II and III
E. None of the statements is necessarily true