$$\text { Find the value of } d ^ { 2 } y / d x ^ { 2 } \text { at the point defined by the given value of } t \text {. }$$

Multiple Choice

$$\text { Find the value of } d ^ { 2 } y / d x ^ { 2 } \text { at the point defined by the given value of } t \text {. }$$
- $$x = 3 \sin t , y = 3 \cos t , t = \frac { 3 \pi } { 4 }$$

A) $2 \sqrt { 2 }$
B) $- 2$
C) $- \frac { 2 \sqrt { 2 } } { 3 }$
D) $\frac { \sqrt { 2 } } { 3 }$