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Given a pre-generics implementation of a method： What three changes allow the class to be used with generics and avoid an unchecked warning？（）
A:Remove line 14.
B:Replace line 14 with "int i = iter.next（）；".
C:Replace line 13 with "for （int i ： intList） {".
D:Replace line 13 with "for （Iterator iter ： intList） {".
E:Replace the method declaration with "sum（List intList）".

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出自：Oracle认证

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