Ryan wants to conduct a survey regarding a new national policy in the United States. Which technique would assure that Ryan’s survey is well-designed and well-conducted?

A. Ryan should select a sample of United States citizens that accurately represents all United States citizens. He should then administer the survey to the selected sample.

B. Ryan should select one age group to represent all United States citizens. He should then administer the survey to all United States citizens in the chosen age group.

C. Ryan should select one city to represent all cities in the United States. He should then administer the survey to all United States citizens that reside in the chosen city.

D: the population is too large for Ryan’s survey to be well-designed and well-conducted