Which line in the excerpt from “Out, Out—” by Robert Frost uses metonymy?
 The boy's first outcry was a rueful laugh, 
 As he swung toward them holding up the hand 
 [Half in appeal, but half as if to keep] [The life from spilling. Then the boy saw all] Since he was old enough to know, big boy 
 [Doing a man's work, though a child at heart]
 He saw all spoiled. 'Don't let him cut my hand off
 [The doctor, when he comes. Don't let him, sister!]
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