I was going through some GRE Quantitative Practice Tests, and found this question. Maybe I'm not understanding the question right (not a native speaker, and have never solved math problems in English), but choice B doesn't seem correct to me. Solutions for x (Quantity A) are 6 and -1, and for y(Quantity B) are -3 and -3. Meaning, -3<6 and -3<-1. Shouldn't A be correct? Also, there's an explanation at the bottom which is correct in general but can't seem to understand how it proves the correct choice.