Highways the Graph Is Shown

Multiple Choice

$$\text { The rational function } f ( x ) = \frac { 120 x } { 100 - x } \text { models the cost, } f ( x ) \text {, in millions of dollars, to remove } x \% \text { of the trash from American }$$ highways. The graph is shown. Use the equation to solve the problem.

-What value of x must be excluded from the rational function's domain?

A) 10
B) 100
C) 1000
D) 1