Find a Unit Vector in the Direction of the Vector $\sqrt { 294 } ( 13 , - 10,5 )$

Multiple Choice

Find a unit vector in the direction of the vector described below. Initial point: (-9,3,-2)
Terminal point: (4,-7,3)

A) $\sqrt { 294 } ( 13 , - 10,5 )$
B) $\frac { 1 } { \sqrt { 28 } } ( 13 , - 10,5 )$
C) $\sqrt { 28 } ( 13 , - 10,5 )$
D) $( 13 , - 10,5 )$
E) $\frac { 1 } { \sqrt { 294 } } ( 13 , - 10,5 )$