(单选题, )下面代码的输出结果是（ ）A = [9,6,4,5]N = len(a)For i in range(int(len(a) / 2)): a[i],a[N-i-1] = a[N-i-1],a[i]Print(a)
A.[9,6,5,4]
B.[5,4,6,9]
C.[5,6,9,4]
D.[9,4,6,5]
正确答案是B