Olive Oil Is Usually Advertised Using Terms Such as "Pure

Olive oil is usually advertised using terms such as "pure olive oil" and "extra virgin," a phrase that denotes the highest grade of olive oil.However,studies have shown that olive oil is one of the most adulterated products on the market.Many of the oils sold in grocery stores are of lower quality than advertised or,even worse,are diluted with other products such as sunflower oil.Olive oil producers who claim to sell extra virgin,pure olive oil but really provide an impure product have engaged in

A) puffery.
B) pro bono advertising.
C) deceptive advertising.
D) unfair advertising.
E) subliminal advertising.