In this question, a word has been used in three different sentences. Choose the option corresponding to the sentence(s) in which the usage of the word is grammatically and contextually correct.  DISCARD
I. The board decided to discard the outdated policy manual and replace it with updated guidelines reflecting current industry standards.
II. Instead of discard the broken prototype, the engineer carefully analyzed its failures to improve the next design iteration.
III. The museum curator chose to discard several damaged artifacts from the exhibition, ensuring only items in good condition were displayed to visitors.