In June of 2012, New York City Mayor Michael Bloomberg

In June of 2012, New York City Mayor Michael Bloomberg proposed banning the sale of any regular soda or other sugary drinks in containers larger than 16 oz. A fast food chain polled a random sample of 2500 of its regular customers and found that 63% opposed the ban, 28% supported the ban, and 9% had no opinion.
-What are the observational units?

A) Sugary drinks
B) Fast food chain regular customers
C) Whether a customer opposes the ban, supports the ban, or has no opinion
D) The percent of customers that oppose the ban, support the ban, or have no opinion