Which of the following best illustrates quality control concerns consumers have about the global food supply market?
a. A group of neighboring county governments in upstate New York has different fertilizer rules.
b. A farmer sells broccoli and lettuce tainted with E. coli at a roadside stand.
c. A pasta dish made in Europe and sold in North America contains unlabeled horsemeat.
d. A shipment of dried milk made and consumed in China is tainted and makes people sick.