Task: Question Answering
Input (English): If \(\sqrt { x + a + b } = \sqrt { x - a - b } \), which of the following must be true?
(A)\(a = 0\) (B)\(b = 0\) (C)\(ab = 0\) (D)\(a + b = 0\) (E)\(a - b = 0\)
Output (English): D