Question: ( 2 ) 2 0 . 3 For a doubly linked list, the sentinel node helps you to get rid of: one extra reference per

(2)2
0.3
For a doubly linked list, the sentinel node helps you to get rid of:
one extra reference per node, saving memory
halitosis. Nobody likes halitosis.
hanging chads, with elections in the balance
edge cases, simplifying your code
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0.3
 (2)2 0.3 For a doubly linked list, the sentinel node helps

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