A Wide-Spread Outbreak of Illness Is Identified as E

A wide-spread outbreak of illness is identified as E. coli contamination of beef patties. Which method is used to help identify additional cases?

A) Distribute a data collection form by a mass mailing.
B) Inform the general public of symptoms via mass media.
C) Ask persons with symptoms to seek medical assistance.
D) Instruct population to avoid eating ground beef patties.