A. The year 2013 uses four different digits. Before 2013 when did this last happen?

B. The digits in 2013 form a run of numbers (0, 1, 2, 3). When did this __last__ happen (not necessarily the same digits)?

C. The digits in 2013 form a run of numbers (0, 1, 2, 3). When will this __next__ happen (not necessarily the same digits)?