关于javascript:选择篇009下面代码的输出是什么

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[1, 2, 3, 4].reduce((x, y) => console.log(x, y))
A: 1 2 and 3 3 and 6 4 
B: 1 2 and 2 3 and 3 4
C: 1 undefined and 2 undefined and 3 undefined and 4 undefined
D: 1 2 and undefined 3 and undefined 4 

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