whose hands are being referred in the sentence all the perfumes of arabia will not sweeten this little hand

L. Macbeth is referring to when she had Duncan's blood all over her hands. She had left the blood from the daggers with the sleeping guards. L.Macbeth is suffering from flashbacks alluding tomuch of the play. Her conscience is bothering her. She says that nothing, not even perfumes of Arabia, can take away the stench of death on her hands.(or aleve her conscience)

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pulling in the reader is important

the answer to "what does the narrator realize by the end of the story" is b.