Give the Exact Value of the Expression $\sin ( \arctan 2 )$

Multiple Choice

Give the exact value of the expression.
- $\sin ( \arctan 2 )$

A) $\frac { 5 \sqrt { 2 } } { 2 }$
B) $2 \sqrt { 5 }$
C) $5 \sqrt { 2 }$
D) $\frac { 2 \sqrt { 5 } } { 5 }$