Find the Magnitude of the Vector Described Below $( 0 , - 6 , - 4 )$

Multiple Choice

Find the magnitude of the vector described below.
Initial point: $( 0 , - 6 , - 4 )$
Terminal point: $( - 1,5,5 )$

A) 19
B) 50
C) $\sqrt { 21 }$
D) $2 \sqrt { 203 }$
E) $\sqrt { 203 }$