单选题

下面两行代码运行的结果是?( )

x=['a','b','c','d']
print(list(enumerate(x)) )

A

( {‘a’,‘b’,‘c’,‘d’} )

B

[(0, ‘a’), (1, ‘b’), (2, ‘c’), (3, ‘d’)]

C

[‘a’,‘b’,‘c’,‘d’]

D

([‘a’,‘b’,‘c’,‘d’] )

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