In the Context of the Effects of Advertisements,humorous Advertisements

In the context of the effects of advertisements,humorous advertisements:

A) ​cannot be used to reinforce and remind loyal customers about the benefits of a product.
B) are effective in changing consumers' deeply rooted values and attitudes.
C) cannot be used by companies that introduce new products.
D) ​are effective at shaping attitudes when consumers already have a positive image of an advertised brand.