Read the following context and choose the best option to answer the question.
Context: Another slap hit his face ( this time the opposite cheek to avoid bruising ) and he let out a choked sob . " I said do n't fucking talk to me like that . " Riku growled threateningly , shoving his fingers in and out of him faster . He took care in not hitting his prostate because he knew deep down Yura was enjoying every fucking minute of it .
Question: Where are the fingers sliding in and out of ?
Options: 
A. A man 's butt
B. None of the above choices .
C. a woman 's vagina
D. a man 's mouth


A