A 10 year male castrated German Shepherd dog presents for an acute onset of ptosis, drooping of the lip, and drooping of the cheek all on the left side. What nerve has been damaged?
一只10岁的雄性已绝育德国牧羊犬由于突发的急性左侧上眼睑，嘴唇以及脸颊下垂前来就诊。这是什么神经受到了损伤？
A CN VII
B CN VI
C CN III
D CN V