If the position vectors of points $A, B, C$ are respectively $\hat{i}, \hat{j}, \hat{k}$ and $\vec{AB} = \vec{CX}$,then the position vector of point $X$ is:
- A$-\hat{i} + \hat{j} + \hat{k}$
- B$\hat{i} - \hat{j} + \hat{k}$
- C$\hat{i} + \hat{j} - \hat{k}$
- D$\hat{i} + \hat{j} + \hat{k}$
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