单选题

运行下列Python程序后的结果是?(    )

def f(n):

      n*2

      return n

a=[7,1]

b=f(a)

print(a,b)

A

[7,1][7,1.7,1]

B

[7,1][14,2]

C

[7,1],[7.11.[7,1]

D

[7,1][7,1]

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