After Gemma's Persuasive Speech on Vegan Dining, Arlen Assumed That

After Gemma's persuasive speech on vegan dining, Arlen assumed that Gemma had abandoned her fast-food life-style. However, Arlen just saw Gemma at A&W enjoying a huge burger, and now believes that Gemma is a hypocrite. . This is an example of an attribution error due to

A) salience.
B) self-knowledge.
C) lack of cognitive capacity.
D) beliefs about other's motivation.