Calvin Is Preparing to Give a Speech in His Personality

Multiple Choice

Calvin is preparing to give a speech in his personality development class.He wants to know if the members in his audience smoke or not.However, he does not want to ask them directly because he wants his speech topic to be a surprise.He is also unsure if they will answer honestly.In this scenario, Calvin could obtain this information by _____.

A) conducting a school-wide survey 
B) asking a representative 
C) informally observing them 
D) reviewing statistical data on the Internet