Find the Domain of the Rational Function $f ( r ) = \frac { r ^ { 2 } + 24 r } { 6 r }$

Multiple Choice

Find the domain of the rational function.
$f ( r ) = \frac { r ^ { 2 } + 24 r } { 6 r }$

A) $\left\{ \mathrm { r } \mid \mathrm { r } \text { is a real number and } \mathrm { r } \neq \frac { 1 } { 6 } \right\}$
B) $\{ r \mid r \text { is a real number and } r \neq 0 \text { and } r \neq - 24 \}$
C) $\{ \mathrm { r } \mid \mathrm { r } \text { is a real number and } \mathrm { r } \neq 6 \}$
D) $\{ \mathrm { r } \mid \mathrm { r } \text { is a real number and } \mathrm { r } \neq 0 \}$