Find the Domain of the Vector Function $\mathbf { r } ( t ) = 7 t \mathbf { i } + \frac { 1 } { t - 9 } \mathbf { j }$

Multiple Choice

Find the domain of the vector function $\mathbf { r } ( t ) = 7 t \mathbf { i } + \frac { 1 } { t - 9 } \mathbf { j }$ .
Select the correct answer.

A) $( - \infty , 9 ) \cup ( 9 , \infty )$
B) $( - \infty , - 7 ) \cup ( - 7 , \infty )$
C) $( - \infty , 7 ) \cup ( 7 , \infty )$
D) $( - \infty , - 9 ) \cup ( - 9 , \infty )$