Which of the Following Actions Must Be Taken to Add

Multiple Choice

Which of the following actions must be taken to add a node X into the middle of a doubly-linked list?
I Update the next reference in the node before the position where X will be placed
II Update the previous reference in the node after the position where X will be placed
III Update the list's first reference

A) I
B) II
C) I and II
D) II and III