The unit vector in the direction of $\vec{x} = (2, 3, \sqrt{3})$ is . . . . . . .
- A$\left(\frac{2}{\sqrt{16}}, \frac{3}{\sqrt{16}}, \frac{\sqrt{3}}{\sqrt{16}}\right)$
- B$\left(\frac{2}{4}, \frac{3}{4}, \frac{\sqrt{3}}{4}\right)$
- C$\left(\frac{1}{2}, \frac{3}{2}, \frac{\sqrt{3}}{4}\right)$
- D$\left(\frac{1}{4}, \frac{3}{2}, \frac{\sqrt{3}}{2}\right)$
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