According to Gilbert's Two-Step Model of Social Perception,why Should Distraction

According to Gilbert's two-step model of social perception,why should distraction make the fundamental attribution error more likely to happen?

A) because it discourages personal attributions,but has little effect on situational attributions
B) because it inhibits perceivers from using distinctiveness information,but allows them to take consistency information into account
C) because it does not interfere with the automatic process of making personal attributions,but does interfere with the more difficult process of making adjustments for situational factors
D) because it changes the interrelationship between the figure and the background in social perception