You may remember that several years ago there was a multistate outbreak of illnesses caused by a specific and unusual strain of Listeria monocytogenes. Why might you remember this? BECAUSE IT TOOK AWAY MY BLUE BELL ICE CREAM. =( Anyway... As part of the investigation of this outbreak, CDC workers checked the food histories of 20 patients infected with the outbreak strain and compared them with the food histories of 20 patients infected with other Listeria strains. Please respond to the following three questions in paragraph form. *What study design best describes this CDC protocol? *Give a specific component of the design that makes you think it is the design you have selected? *What kinds of conclusions can the CDC make with a study design like this? *Is there another study design that would have been more helpful? Explain why or why not