The Circle or Ellipse Shown in the Calculator-Generated Graph Was $y_{1}$

Multiple Choice

The circle or ellipse shown in the calculator-generated graph was created using function mode with a square viewing window. What are the two functions $y_{1}$ and $y_{2}$ that were used to obtain the graph whose equation is given?
- $x^{2}+\frac{(y+5) ^{2}}{25}=1$

A) $y_{1}=5+5 \sqrt{1+x^{2}}, y_{2}=5-5 \sqrt{1+x^{2}}$

B) $y_{1}=-5+5 \sqrt{1+x^{2}}, y_{2}=-5-5 \sqrt{1+x^{2}}$

C) $y_{1}=5+5 \sqrt{1-x^{2}}, y_{2}=5-5 \sqrt{1-x^{2}}$

D) $y_{1}=-5+5 \sqrt{1-x^{2}}, y_{2}=-5-5 \sqrt{1-x^{2}}$