Find $\lim _{x \rightarrow \infty} \frac{1-7 x}{1+9 x}$ (If It Exists)

Multiple Choice

Find $\lim _{x \rightarrow \infty} \frac{1-7 x}{1+9 x}$ (if it exists) .

A) 0
B) $-\frac{7}{9}$
C) $\frac{7}{9}$
D) $-\infty$
E) limit does not exist