If $\theta$ is the angle between vectors $\vec{A}$ and $\vec{B}$,then what is the value of the product $(\vec{B} \times \vec{A}) \cdot \vec{A}$?
- A$BA^2 \cos \theta$
- B$BA^2 \sin \theta$
- C$BA^2 \sin \theta \cos \theta$
- DZero
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