This is a fun question. If J is in 8, we have to place O right before J, in 7. That means M has to go in 6 (and 1) in order to be before O.
So we’ve placed those three variables. We’ve got K and L left to place in 4 and 5. K can’t go before L, so K must go in 5. L goes in 4.
That means we’ve placed all 10 variables! A is CORRECT.
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