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According to the Mayo Clinic, a female patient is considered to be anemic if her blood hematocrit value (the proportion of the blood made up of red blood cells) is lower than $35\%$.

A doctor takes a small sample of her patient's blood to check for anemia and measures the hematocrit value to be $38\%$. Which of the following statements is true?

I. 38% is the population parameter.

II. The blood drawn by the doctor is the sample for this study.

III. The doctor obtains a sample of blood from the patient in order to draw a conclusion about the population of the patient's blood.

A

II only.

B

I and II only.

C

I and III only.

D

II and III only.

E

I, II, and III.

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