At What Value of X Could the Function F(x) = $\frac { \ln x + x } { x }$

Multiple Choice

At what value of x could the function f(x) = $\frac { \ln x + x } { x }$ have a possible relative maximum or minimum?

A) x = 1
B) x = $e ^ { 2 }$
C) x = $\frac { 1 } { e }$
D) x = e
E) none of these
Differentiate.