An "avid" reader is likely to be:

An "avid" reader is characterized by a strong enthusiasm and passion for reading. This term conveys a sense of eagerness and dedication, suggesting that the individual not only reads frequently but also genuinely enjoys the activity. Such readers are often motivated by a desire to explore new ideas, genres, and authors, seeking to immerse themselves in literature as a means of enjoyment or learning.

The other choices do not align with the meaning of "avid." For instance, being disinterested in literature directly contradicts the idea of enthusiasm for reading. Similarly, while being quick to finish books may describe a reader's pace, it does not reflect their passion or commitment. Lastly, being traditional in book choices suggests a resistance to diversity in reading material, which does not align with the open-mindedness typically associated with avid readers. Thus, the option that best captures the essence of an avid reader is the one that highlights their enthusiasm for reading.