Find $y'$ by implicit differentiation. Match the equations defining $y$ implicitly with the letters labeling the expressions for $y'$.

1. $3 x\cos y + 5 \cos 2y= 3 \sin y$
2. $3 x\sin y + 5 \sin 2y= 3 \cos y$
3. $3 x\cos y + 5 \sin 2y= 3 \sin y$
4. $3 x\sin y + 5 \cos 2y= 3 \cos y$

A. $\displaystyle y' = \frac {3 \cos y } {3 x \sin y - 10 \cos 2y + 3 \cos y }$
B. $\displaystyle y' = \frac {3 \sin y } {-3 x \cos y - 10 \cos 2y - 3 \sin y }$
C. $\displaystyle y' = \frac {3 \sin y } { 10 \sin 2y - 3 x \cos y -3 \sin y }$
D. $\displaystyle y' = \frac {3 \cos y } {3 x \sin y + 10 \sin 2y + 3 \cos y }$