Write the Complex Number in Standard Form $\sqrt { - 20 } \times \sqrt { - 18 }$

Multiple Choice

Write the complex number in standard form.​ $\sqrt { - 20 } \times \sqrt { - 18 }$ ​ ​

A) $6 \sqrt { 10 }$
B) $- \sqrt { 20 }$
C) - $6 \sqrt { 10 }$
D) $\sqrt { 18 }$
E) $\sqrt { 20 }$