If you're worried ab being distracted at the testing center, go to the public library and do some sections on one of the computers there. Get used to testing w/ people walking behind you and using a clunky computer like they have at Prometric.

You're on the right track, but you're mapping it out backwards. To be suspect class (S), homosexuality must be an immutable trait (I): S -> I. Plantiffs have not shown that homosexuality (H) is an immutable trait: H -> /I. If it's not an immutable trait then it cannot be a suspect class: /I -> /S (this is the contrapositive of the first premise). Therefore, H -> /I -> /S. Does this make sense?