If $f(x) = -2x^8$, then the correct statement is : (A) $f'\left(\frac{1}{2}\right) = f'\left$-\frac{1}{2}\right$$ (B) $f'\left(\frac{1}{2}\right) = -f'\left$-\frac{1}{2}\right$$ (C) $-f'\left(\frac{1}{2}\right) = f\left$-\frac{1}{2}\right$$ (D) $f\left(\frac{1}{2}\right) = -f\left$-\frac{1}{2}\right$$