单选题

运行下列程序,输出结果正确的是?( )

def demo(lst, k):
    if k<len(lst):
        return lst[k:]+lst[:k]
lst=[1,2,3,4,5,6]
print(demo(lst,4))


A

[4,5,6,1,2,3]

B

[5,6,1,2,3,4]

C

[6,5,4,3,2,1]

D

[1,2,3,4,5,6]

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