Find the direction cosines of the vector $\hat i + 2\hat j + 3\hat k$

Question

$\begin{array}{1 1}(A) \bigg( \large\frac{-1}{\sqrt{14}}, \large\frac{2}{\sqrt{14}}, \large\frac{3}{\sqrt{14}}\bigg) \\ (B) \bigg( \large\frac{1}{\sqrt{14}}, \large\frac{2}{\sqrt{14}}, \large\frac{3}{\sqrt{14}}\bigg) \\ (C) \bigg( \large\frac{1}{\sqrt{14}}, \large\frac{-2}{\sqrt{14}}, \large\frac{3}{\sqrt{14}}\bigg) \\(D) \bigg( \large\frac{1}{\sqrt{14}}, \large\frac{2}{\sqrt{14}}, \large\frac{-3}{\sqrt{14}}\bigg) \end{array}$