Read the following context and choose the best option to answer the question.
Context: This time Rikki keeps her hand clamped tight over the struggling boy 's mouth for a good two minutes before she lets him go . He looks up at her afterwards , breathing hard to catch his breath , with a frank look of wary fascination on his face . And down and back around toward the shops walks Rikki . Here now on a street corner Rikki runs across several of her old buds , classmates from their days together at Casimir Pulaski High . " Hey Rikki !
Question: What may have caused Rikki to put her hand over the boy 's mouth ?
Options: 
A. The boy had a fascination for Rikki 's dominance .
B. She was showing her dominance .
C. Her old buds told her to do it .
D. The boy was trying to attack her .


B