Select the word that offers the best antonym for viable.

Which persuasive technique is used in this advertisement? are you sick and tired of that outdated cell phone of yours? does your signal cut out every time you make a call? are you paying too much for horrible cell phone service? well, those days are over! the new generation g550 digital cell phone is a gem in a sea of everyday rocks. it is the most revolutionary cell phone on today's market. the facts speak the truth. the generation g550 cell phone can be yours for a mere $99.95. this is today's hottest technology! do what the rest of the country is doing and buy one now before you miss out! you don't want to be the only one in your group without a phone like this, do you? a. celebrity endorsement b. scientific data c. emotional appeal d. bandwagon