Answer:
3 Stanza :) have a day
and by the way I am not smart hahaah
<em /><u><em>"She did not understand what happened."
</em></u>It is a complete sentence since it has a subject (she) and a verb (understand), and is independent (i.e. doesn't require another clause to make sense<u><em>
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You shouldn't be asking people to doing this for you. You should asking them for help.