When graphing the function f(x)=x^2-81/x^2-11x+18 on your graphing calculator, what is the most appropriate viewing window for determining the domain and range of the function?

A) xmin: -10, xmax: 10
ymin: -10, ymax: 10

B) xmin: -5, xmax: 5
ymin: -5, ymax: 5

C) xmin: 0 xmax: 10
ymin: 0 ymax: 10

D) xmin: -10 xmax: 0
ymin: -10 ymax: 0