Express the Vector as a Product of Its Length and Direction

Multiple Choice

Express the vector as a product of its length and direction.
-5i + 10j + 10k

A) $15 \left( \frac { 1 } { 45 } \mathrm { i } + \frac { 2 } { 45 } \mathrm { j } + \frac { 2 } { 45 } \mathrm { k } \right)$
B) $15 ( 5 \mathbf { i } + 10 \mathbf { j } + 10 \mathbf { k } )$
C) $15 ( \mathbf { i } + \mathbf { j } + \mathbf { k } )$
D) $15 \left( \frac { 1 } { 3 } \mathrm { i } + \frac { 2 } { 3 } \mathrm { j } + \frac { 2 } { 3 } \mathrm { k } \right)$