The Laplace Transform Of $t ^ { 3 } e ^ { - t }$

Multiple Choice

The Laplace transform of $t ^ { 3 } e ^ { - t }$ is

A) $1 / ( s + 1 )$
B) $- 1 / ( s + 1 ) ^ { 2 }$
C) $2 / ( s + 1 ) ^ { 3 }$
D) $- 6 / ( s + 1 ) ^ { 4 }$
E) $6 / ( s + 1 ) ^ { 4 }$