Suppose 60% of American adults believe Martha Stewart is guilty of obstruction of justice and fraud related to insider trading. We will take a random sample of 20 American adults and ask them the question. Then the sampling distribution of the sample proportion of people who answer yes to the question is:
A. approximately Normal, with mean 0.6 and standard error 0.1095.
B. approximately Normal, with unknown mean and standard deviation.
C. Binomial, with n=20 and p=0.60.
D. neither Normal, not Binomial.