Name the 4 foodborne illnesses from the past 20 years, involving dairy.
a) E. coli, Salmonella, Listeria, Campylobacter
b) Botulism, Staphylococcus, Clostridium, Bacillus
c) Norovirus, Hepatitis A, Rotavirus, Giardia
d) Shigellosis, Vibrio, Cryptosporidium, Toxoplasma