Multiply Write Your Answer in a + Bi Form $7 \mathrm { i } ( 8 - 8 \mathrm { i } )$

Multiple Choice

Multiply. Write your answer in a + bi form.
- $7 \mathrm { i } ( 8 - 8 \mathrm { i } )$

A) $56 i + 56 i ^ { 2 }$
B) $56 + 56 \mathrm { i }$
C) $56 \mathrm { i } - 56 \mathrm { i } ^ { 2 }$
D) $56 \mathrm { i } - 56$