Write in Terms of I $\sqrt { - 324 }$ A) $18 \mathrm { i }$

Multiple Choice

Write in terms of i.
- $\sqrt { - 324 }$

A) $18 \mathrm { i }$
B) $- \mathrm { i } \sqrt { 18 }$
C) $\pm 18$
D) $- 18 \mathrm { i }$