Answer:
B. Troublemaker
Step-by-step explanation:
Lets go down the list of options to figure out which ones the most fitting.
A. Roxanne - There really isn't bias with this one, so we can knock this one out (it's just her name).
B. Troublemaker - This word is used for people who seemed to repeatably get others or themselves in trouble. In this context, this is showing that in this person's perspective that she was the one "at fault".
C. Started - While this option is also supporting the idea that Roxanne caused the fight to happen, it is just stating a fact (if true or not).
D. Fair - The person's opinion as shown through the text is that Roxanne was causing the fight on purpose, so fair would not make sense as the biased word.
Hope this was helpful!