Write the Number as the Product of a Real Number $- \sqrt { - 16 }$

Multiple Choice

Write the number as the product of a real number and i.
- $- \sqrt { - 16 }$

A) $- 4 \mathrm { i }$
B) 4
C) $4 \mathrm { i }$
D) $\mathrm { i } \sqrt { 16 }$