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listEn to A pArt oF A tAlk in A history lECturE.

how DoEs thE proFEssor support his stAtEmEnt thAt "AmEriCA wAs thE unDErDog" in thE wArA．with An AnECDotE ABout kEy’s nEgotiAtion From A prisonEr’s rElEAsE.
B．with kEy’s lEttEr DEsCriBing whAt hE sAw From thE EnEmy’s BAttlEship All night.
C．with tEstimony From A prEsumED ExpErt.
D．with An ExplAnAtion oFBritAin’s intErFErEnCE withAmEriCAn trADE.