单项选择题

A.p->next->prev=p->prev;p->prev->next=p->prev;free(p);
B.p->next->prev=p->next;p->prey->next=p->next;free(p);
C.p->next->prev=p->next;p->prev->next=p->prev;free(p);
D.p->next->prey=p->prey;p->prev->next=p->next;free(p);