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

Multiple Choice

$$\text { Find the value of } d ^ { 2 } y / d x ^ { 2 } \text { at the point defined by the given value of } t \text {. }$$
- $$x = 6 t ^ { 2 } - 3 , y = t ^ { 3 } , t = 1$$

A) $\frac { 1 } { 4 }$
B) $- \frac { 1 } { 4 }$
C) $\frac { 1 } { 48 }$
D) $- \frac { 1 } { 48 }$