The available options are:
A. A census
B. A survey
C. A single-blind experiment
D. A prospective observational study
Answer:
B. A survey
Explanation:
Survey is a form or technique for carrying out reseach studies, often used in social research and demography. It comprises a list of questions purposely to gather definite data from a distinguished set of people.
Surveys helps to assess thoughts, opinions, and feelings on particular subject or area of interest.
Hence, in this case, the statistical study that would be most appropriate to answer this question is SURVEY.
