请阅读下面一段程序: import pandas as pd date_index = pd.to_datetime(['20180908', '20181008', '20181108']) date_index[2] 运行上述程序,它最终执行的结果为()。
A. Timestamp('2018-11-08 00:00:00')
B. Timestamp('2018-10-08 00:00:00')
C. Timestamp('2018-11-08')
D. Timestamp('2018-10-08')