What Is the Resultant Displacement If a Hiker Walks 250 $\circ$

Multiple Choice

What is the resultant displacement if a hiker walks 250 m north, turns and walks 300 m east?

A) 390.5 m at 40 ^$\circ$
B) 390.5 m at 50 ^$\circ$
C) 550 m at 40 ^$\circ$
D) 550 m at 50 ^$\circ$