C · React, Next.js and frontendQuestion 21 of 21Multiple choiceBasicThe index as a key in a listBookmarkReview laterA list of users with form fields uses the index as its key. What can go wrong after the items are reordered?Choose one answer.A.Nothing — the index is always unique among siblings.B.State typed for one person can end up assigned to another.C.React throws a duplicate-key error.D.Keys must be unique across the whole app, and indexes repeat.Check answerBased on the cardC-P05 · Why does React need a key on list items? — React, Next.js and frontend