Is it possible that $\vec{A} + \vec{B} = \vec{A} - \vec{B}$?
- AYes,if $\vec{B}$ is a null vector.
- BYes,if $\vec{A}$ is a null vector.
- CNo,it is never possible.
- DYes,if $\vec{A}$ and $\vec{B}$ are perpendicular.
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