Best Dollar Store publishes an advertisement in the local newspaper promoting its new baby diapers that are good for the environment. The advertisement states that the diapers are made from entirely biodegradable materials and that each diaper will completely biodegrade within two months and become a natural part of the soil. Leon is very concerned about the environment and has created a compost heap in the pasture behind his home. Leon purchases a package of the diapers for his child, and, as they are soiled, he adds them to the compost heap. Six months later, the diapers have not even begun to degrade. Best Dollar Store has violated:

a. nothing, because the statement about the diapers biodegrading within two months is an opinion.

b. its implied warranty that the diapers will biodegrade within two months.

c. its express warranty that the diapers will biodegrade within two months.

d. nothing, because an advertisement is not a warranty.