The Secret of Success in Surveying Public Opinion Is

The secret of success in surveying public opinion is

A) that the people interviewed are representative of the whole population.
B) to survey only those people who have a real stake in the political system: the middle and upper classes.
C) to throw out survey responses that do not follow popular opinions.
D) that the sample of people is drawn from people interviewed on a typical street corner.
E) to select only responses that support the hypothesis.