Which of the following is mentioned as one of the causes of bad breath

A．they hate to see any changes in things they are familiar with
B．the unit price for a product often rises as a result
C．they have to pay for the cost of changing package sizes
D．this entails an increase in the cost of packaging

A．dishonest packaging
B．inferior packaging
C．the changes in package size
D．exaggerated illustrations on packages