The answer is A. Romo's perspective changes from animosity for El Paso to appreciation.
Animosity is strong hostility, and his distaste for El Paso was stated in "I spent most of my life trying to get out of "The Pass.""
He learned to appreciate his hometown over time, which is supported by the first sentence: "As a writer and historian whose job it is to retrieve the past, I realize now that El Paso was a good place to grow up."