How does the author develop the viewpoint of young Arturo toward the end of "An Hour with Abuelo"? By having Arturo say that Abuelo didn't try hard enough to accomplish what he wanted in his life, it shows that Arturo is mean and immature.

By describing Abuelo as a crumpled-up brown paper sack with some bones in it, it shows that Arturo has a creative mind.

By describing Arturo glancing at his watch, it shows that Arturo is disinterested in what Abuelo is saying.

By relating Abuelo's life's story, Arturo shows that he has taken an interest in Abuelo and his early life.