Find the Product A) $- 24$ B) $24 \mathrm { i }$

Multiple Choice

Find the product. Write the product in rectangular form, using exact values.
- $\left[ 4 \left( \cos 315 ^ { \circ } + \mathrm { i } \sin 315 ^ { \circ } \right) \right] \left[ 6 \left( \cos 225 ^ { \circ } + \mathrm { i } \sin 225 ^ { \circ } \right) \right]$

A) $- 24$
B) $24 \mathrm { i }$
C) 24
D) $- 24 \mathrm { i }$