I think the answer is B
1, X=Y-> /x/=3 -> x = 3 or x = -3 -> insufficient
2, y = 3 -> 3x = 9 -> x=3 -> sufficient
1, X=Y-> /x/=3 -> x = 3 or x = -3 -> insufficient
2, y = 3 -> 3x = 9 -> x=3 -> sufficient
![FLO – Therapy at the Club – Pre-Single [iTunes Plus M4A]](http://is1-ssl.mzstatic.com/image/thumb/Music221/v4/a4/11/88/a41188ed-0f2e-e8d5-1163-d59e373cc58c/26UMGIM30046.rgb.jpg/208x208bb.webp)
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