As with all list questions, take the rules one at a time, and use them to eliminate wrong answers. Start with simple rules such as looking for L/H in eighth, or making sure that O is in first or fifth.
A is CORRECT.
B is wrong because T needs to be before F or after R.
C is wrong because O has to be in 1 or 5 (rule 3).
D is wrong because S can’t be beside O (rule 6).
E is wrong because F and R are too close (rule 2).
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