In a recent study of the prevalence of a disease, a simple random sample of 35,000 americans were selected and it was found that 20.1% reported having the disease. a hypothesis test for a difference from the expected 20% was found to be highly significant, though the difference is quite small. the explanation is that
a. it was an aberrant sample.
b. the value of 20.1% is large compared to the hypothesized value of 20%.
c. the sample size is very large.
d. all of the above.