At the end of the tale, the Pardoner tries to sell absolutions byGroup of answer choicesusing humor.instilling fear.using reason.instilling guilt.

The Pardoner in Geoffrey Chaucer's "The Canterbury Tales" uses a blend of tactics to sell his pardons and absolutions, but most prominently, he relies on instilling fear. He emphasizes the dire consequences of sin and the torments of hell to persuade individuals to purchase pardons. By playing on the fears of his audience regarding damnation and the afterlife, he effectively manipulates them into buying his indulgences, claiming they can save them from such fates.

His use of moral tales that illustrate the punishment for greed and sin serves to heighten this fear, making his audience more susceptible to his selling techniques. Thus, while humor, reason, and guilt may play roles in the broader context, the most direct answer to this question is that he primarily uses fear.