GRE Sample Test 1 Quantitative Reasoning 2

Plug In numbers for a, b, and c. If a = −2, b = 3, and c = 4, then ac = −8. Quantity B is greater; eliminate (A) and (C). If a = 2, b = −3, and c = −4, then ac is still negative. Quickly consider different numbers, but realize that Quantity A will always be negative.