br600085 br600085 19-01-2023 Mathematics contestada What is the sign of -4ab−4abminus, 4, a, b when a>0a>0a, is greater than, 0 and b<0b<0b, is less than, 0? Choose 1 answer: Choose 1 answer: (Choice A) A Positive (Choice B) B Negative (Choice C) C Zero