For Questions , Use the Following Narrative

For Questions , use the following narrative
Narrative: Genetic defect
Suppose a population contains 100,000 individuals, of which 500 are carriers of a certain genetic defect.
-{Genetic defect narrative}Which of the following is not an appropriate way to express this result as a portion of the total?

A) One half of one percent (0.5%) of all individuals in this population are carriers.
B) The proportion in this population who are carriers is 0.005.
C) The probability that a person randomly selected from this population is a carrier is 0.5%
D) All of the above are appropriate.