If $\bar{x}$ is a non-zero vector and $k < 0, k \neq -1$,then $\frac{k \bar{x}}{|\bar{x}|}$ is $.........$
- Aunit vector in the direction of $\bar{x}$
- Bunit vector in the opposite direction of $\bar{x}$
- Cin the opposite direction of $\bar{x}$ having magnitude $|k|$
- Din the direction of $\bar{x}$ having magnitude $|k|$
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