Perform the Indicated Operation $\frac { 1 - 21 i } { - 7 i }$

Multiple Choice

Perform the indicated operation. Write the result in the form a + bi.
- $\frac { 1 - 21 i } { - 7 i }$

A) $- \frac { 1 } { 7 } + 3 i$
B) $3 + \frac { 1 } { 7 } \mathrm { i }$
C) $\frac { 1 } { 7 } - 3 i$
D) $- 3 - \frac { 1 } { 7 } \mathrm { i }$