Find a Unit Vector U in the Direction Opposite Of \mathbf

Multiple Choice

Find a unit vector u in the direction opposite of $$\mathbf { v } = \langle 2,8 , - 3 \}$$

A) $\mathbf { u } = ( - 1 / \sqrt { 77 } ) ( 2,8 , - 3 )$
B) $\mathbf { u } = ( 1 / \sqrt { 59 } ) ( 2,8 , - 3 )$
C) $\mathbf { u } = ( - 1 / \sqrt { 59 } ) ( 2,8 , - 3 \}$
D) $\mathbf { u } = ( 1 / \sqrt { 77 } ) \{ 2,8 , - 3 \}$
E) $\mathbf { u } = ( - 1 / 6 \sqrt { 2 } ) \{ 2,8 , - 3 \}$