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: 
A. None of the above choices .
B. Bella is enamored with a guy .
C. Bella is bored with studying .
D. Bella is careless with studies .


B