Simplify the Rational Expression $$\frac { x ^ { 2 } + 5 x + 4 } { x ^ { 2 } + 7 x + 12 } \cdot \frac { x ^ { 2 } - 8 x + 15 } { x ^ { 2 } - 4 x - 5 }$$

Multiple Choice

Simplify the rational expression. (Assume the denominator is nonzero.)
- $$\frac { x ^ { 2 } + 5 x + 4 } { x ^ { 2 } + 7 x + 12 } \cdot \frac { x ^ { 2 } - 8 x + 15 } { x ^ { 2 } - 4 x - 5 }$$

A) $\frac { x - 3 } { x + 3 }$
B) $- 1$
C) $\frac { x + 3 } { x - 3 }$
D) 1