Read the following context and choose the best option to answer the question.
Context: But Bella was barely listening . She was watching the instructor , only a few years older than her mere fourteen years , prepare for another serve . His muscles rippled through his shirt as he raised a sculpted arm and swung through .
Question: Why is Bella not a disciplined student at the moment ?
Options: 
- None of the above choices .
 - Bella is enamored with a guy .
 - Bella is bored with studying .
 - Bella is careless with studies .


Bella is enamored with a guy .