Replace the Polar Equation with an Equivalent Cartesian Equation $r = 40 \sin \theta$

Multiple Choice

Replace the polar equation with an equivalent Cartesian equation.
- $r = 40 \sin \theta$

A) $x ^ { 2 } + ( y - 20 ) ^ { 2 } = 400$
B) $\mathrm { y } = 40$
C) $( x - 20 ) ^ { 2 } + y ^ { 2 } = 400$
D) $x ^ { 2 } + ( y - 40 ) ^ { 2 } = 400$