Write the Expression in the Standard Form a + Bi $8 \mathrm { i } - ( - 3 - \mathrm { i } )$

Multiple Choice

Write the expression in the standard form a + bi.
- $8 \mathrm { i } - ( - 3 - \mathrm { i } )$

A) $- 3 + 7 \mathrm { i }$
B) $3 + 9 \mathrm { i }$
C) $3 - 7 \mathrm { i }$
D) $- 3 - 9 \mathrm { i }$