Task: Question Answering
Input (English): If \(a < 0\) and \(b > 0\), which of the following could not be true?
(A)\(a + b = 0\) (B)\(a - b = 0\) (C)\(ab < 0\) (D)\(\frac { a } { b } < 0\) (E)\(b + a > 0\)
Output (English): B