PT.30 S1 Q21- If K is assembled on line 2, which one of the following must be true?

casablanca-1

For this question, I did not choose A because I created a world where F is not 1 lower than S and I don't understand what I'm getting wrong, I doubled checked the rules.
The world is: F K J S M G H
lol I know I did not crack the lsat, #help fr

Thanks

Admin Note: https://7sage.com/lsat_explanations/lsat-30-section-1-game-4/

claremont

Your world is valid. I think you misread the AC.

For quick reference:
AC A: "F is assembled on a lower-numbered line than S."