Give the Degree Measure of θ $\theta = \arctan \left( \frac { \sqrt { 3 } } { 3 } \right)$

Give the degree measure of θ.
- $\theta = \arctan \left( \frac { \sqrt { 3 } } { 3 } \right)$

A) $30 ^ { \circ }$
B) $150 ^ { \circ }$
C) $330 ^ { \circ }$
D) $- 30 ^ { \circ }$