3. The parametric equations of an ellipse are $\left\{\begin{array}{l}x=2+5 \cos \theta \\ y=-3+4 \sin \theta\end{array}\right.$ ( $\theta$ is the parameter), then the coordinates of its foci are
A. $(-5,3)$ and $(1,3)$
B. $(-1,-3)$ and $(5,-3)$
C. $(-1,0)$ and $(5,0)$
D. $(3,0)$ and $(-3,0)$
3. B The standard equation is $\frac{(x-2)^{2}}{5^{2}}+\frac{(y+3)^{2}}{4^{2}}=1$.