The state of California reported a total of 1904 cases of pertussis (whooping cough) for all of the year 2013, 12% of which were infants less than six months old. Infants this young cannot be vaccinated yet and must rely on herd immunity for protection from the virus.

If we took many random samples of 100 California residents diagnosed with pertussis in 2013 and computed the proportion in each sample who are infants, the distribution of these values would be

Group of answer choices

A. the population distribution of infants diagnosed with Pertussis.

B. the sampling distribution of the proportion who are infants.

C. a Normal distribution because of the law of large numbers.

D. the sampling distribution of infants diagnosed with Pertussis.