Let $\mathrm { a } \in \left( \frac { \pi } { 12 } , \frac { \pi } { 6 } \right)$.
$$\begin{aligned}
& x = \sin ( 3 a ) \\
& y = \cos ( 3 a ) \\
& z = \tan ( 3 a )
\end{aligned}$$
What is the correct ordering of the numbers?\\
A) $x < y < z$\\
B) $x < z < y$\\
C) $y < x < z$\\
D) $y < z < x$\\
E) $z < x < y$