Oh, we're supposed to do a mental translation from numbers to letters!

I think the questions and the answers are both ol lists, and somebody's browser rendered that as 1. A. B. C. D. 2. A. B. C. D. ...

the only one that works (#2) overwrites the file "sw"

I noticed the inconsistency between the question and answer, but somehow read the question as "<sw". That's pretty funny.