Write an Equivalent Expression in Exponential Form $$\log _ { ( x - 1 ) } 10 = 1$$

Write an equivalent expression in exponential form.
- $$\log _ { ( x - 1 ) } 10 = 1$$

A) $\{ - 9 \}$
B) $\{ 11 \}$
C) $\{ - 11 \}$
D) $\{ 9 \}$