单选题

ls=['富强','民主','文明','和谐','自由','平等','公正','法治'],下列切片结果为['和谐', '平等']的选项是?()

A

ls[-5:-2:-2]

B

ls[-5:-2:2]

C

ls[4:-3:1]

D

ls[4:-2:2]

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