Riley Travels a Great Deal, and Over the Past Several

Riley travels a great deal, and over the past several years he has read dozens of reviews of hotel chains, all of which rave about the clean rooms and great service at Comeon Inns. Last month, Riley checked into a room at a Comeon Inn for the first time, only to find the room filthy and the service lousy. He decided the Comeon Inn chain is inferior to other hotel chains.

A) Riley was irrational to have believed the reviews that he had read.
B) Riley was rational to have changed his mind about Comeon Inns based on his one experience.
C) Riley is an example of someone who gives too much weight to a small number of vivid observations.
D) Riley is an example of someone who is reluctant to change his mind.