The Eastward Component of Vector $\vec { A }$ Is Equal to the Westward Component of Vector

Multiple Choice

The eastward component of vector $\vec { A }$ is equal to the westward component of vector $\vec { B }$ and their northward components are equal.Which one of the following statements must be correct for these two vectors?

A) Vector $\vec { A }$ is parallel to vector $\vec { B }$
B) Vector $\vec { A }$ is antiparallel (in the opposite direction) to vector $\vec { B }$
C) Vector $\vec { A }$ must be perpendicular to vector $\vec { B }$
D) The magnitude of vector $\vec { A }$ must be equal to the magnitude of vector $\vec { B }$
E) The angle between vector $\vec { A }$ and vector $\vec { B }$ must be 90°.