Relative Velocity: a Plane Has an Eastward Heading at a Speed

Multiple Choice

Relative velocity: A plane has an eastward heading at a speed of 156 m/s (relative to the air) . A 20.0 m/s wind is blowing southward while the plane is flying. The velocity of the plane relative to the ground is

A) 157 m/s at an angle 7.31° south of east.
B) 157 m/s at an angle 7.31° east of south.
C) 155 m/s at an angle 7.36° south of east.
D) 155 m/s at an angle 7.36° east of south.
E) 157 m/s at an angle 7.36° south of east.