Vector $\overrightarrow { \mathbf { M } }$ = 400 M Points Eastward and Vector

Vector $\overrightarrow { \mathbf { M } }$ = 4.00 m points eastward and vector $\overrightarrow { \mathrm { N } }$ = 3.00 m points southward. The resultant vector $\overrightarrow { \mathbf { M } }$ + $\overrightarrow { \mathrm { N } }$ is given by

A) 5.00 m at an angle of 36.9° south of east.
B) 5.00 m at an angle of 53.1° south of east.
C) 5.00 m at an angle of 71.6° south of east.
D) 5.00 m at an angle of 18.4° south of east.
E) 5.00 m at an angle of 26.6° south of east.