Write in Terms of I $\sqrt { - 400 }$ A) $- 20 \mathrm { i }$

Multiple Choice

Write in terms of i.
- $\sqrt { - 400 }$

A) $- 20 \mathrm { i }$
B) $20 \mathrm { i }$
C) $\mathrm { i } \sqrt { 20 }$
D) $\pm 20$