Task: Question Answering
Input (English): If \(x^2 + y = 0\), which of the following must be true?
(A)\(x^2 = y\) (B)\(xy = y\) (C)\(x = \frac{y}{x}\) (D)\(x^3 = y^2\) (E)\(x^4 = y^2\)
Output (English): E