Solve the Formula for the Specified Variable $d = r t \quad$

Multiple Choice

Solve the formula for the specified variable.
- $d = r t \quad$ for $r$

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