![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
在一个中,在*p节点之前插入节点*q的操作是 _______。
A.
p -> prior = q ; q-> next=p ; p -> prior ->next=q ; q ->prior= p -> prior ;
B.
q ->prior= p -> prior ; p -> prior ->next=q ; q-> next=p ; p -> prior = q->next ;
C.
q-> next=p ; p -> next=q ; q-> prior ->next= q ; q-> next=p ;
D.
p -> prior ->next=q ; q-> next=p ; q -> prior = p->prior ; p -> prior = q ;