Solve the Problem $f ( x ) = e ^ { x }$

Multiple Choice

Solve the problem.
-If $f ( x ) = e ^ { x }$ , find $f \left[ \ln \left( \frac { 1 } { e ^ { 3 } } \right) \right]$

A) $e ^ { 1 / x }$
B) $\ln e$
C) $- 3$
D) $\frac { 1 } { e ^ { 3 } }$