Simplify the Following Expression $$\frac { 2 ^ { - 3 } } { 3 ^ { - 1 } }$$

Multiple Choice

Simplify the following expression. $$\frac { 2 ^ { - 3 } } { 3 ^ { - 1 } }$$

A) 1
B) $\frac { 3 } { 8 }$
C) $\frac { 2 } { 3 }$
D) $\frac { 8 } { 3 }$
E) $- \frac { 3 } { 8 }$