... other logical indicator becomes a negation. Meaning that the used indicator ... follows unless) and apply the negation to the J which is ... the "Cannot") and apply the negation to the W which is ...
Try the negation test! If something must be true, it cannot be false. So if you negate your answer and the argument falls apart, then that is your correct answer, bc it must be false in order for the argument to stand!
Anything other than group 1 would be a negation. If the AC says that A must be in group 1 the true negation is:
A can be in something that is not group 1
This includes all other possibilities other than 1.