已知一动点到两定点\( {F}_{1}(0,-3),{F}_{2}(0,3\))的距离之和等于10\( ,\)则此动点的轨迹方程为 ( )
A. \( \frac{{x}^{2}}{25}＋\frac{{y}^{2}}{16}=1\)
B. \( \frac{{x}^{2}}{16}＋\frac{{y}^{2}}{25}=1\) C. \( \frac{{x}^{2}}{25}＋\frac{{y}^{2}}{9}=1\) D. \( \frac{{x}^{2}}{9}＋\frac{{y}^{2}}{25}=1\)
