Ken Berry, the President and CEO of Pepe's Pizzeria, stated that billboard advertising provides a good return on investment. This statement suggests Berry believes which of the following?

a$.$ Billboard advertising does not result in sufficient benefits compared to the costs.

b$.$ Print advertising is preferable to billboard advertising.

c$.$ The cost of billboard advertising is worth the benefits the company receives in exchange.

d$.$ Television advertising is preferable to billboard advertising.