Find the Center and the Vertices of the Ellipse $81 x ^ { 2 } + y ^ { 2 } = 81$

Multiple Choice

Find the center and the vertices of the ellipse.​ $81 x ^ { 2 } + y ^ { 2 } = 81$ ​

A) center: (-9,9) ;vertices: (-1,-9) , (1,9)
B) center: (0,0) ;vertices: (0,-9) , (0,9)
C) center: (0,0) ;vertices: (-9,-1) , (9,1)
D) center: (0,0) ;vertices: (-9,0) , (9,0)
E) center: (-9,9) ;vertices: (-1,0) , (1,0)