Solve the Formula for the Specified Variable $\mathrm { d } = \mathrm { rt } ;$

Multiple Choice

Solve the formula for the specified variable.
- $\mathrm { d } = \mathrm { rt } ;$ for $\mathrm { r }$

A) $r = \frac { t } { d }$
B) $r = d - t$
C) $r = \frac { d } { t }$
D) $\mathrm { r } = \mathrm { dt }$