Which of the Following Statements Best Describes the Graph of the Function

Multiple Choice

Which of the following statements best describes the graph of the function f(x) = ?

A) The graph is concave up on (0, $\infty$ ) .
B) The graph is concave down on (0, $\infty$ ) .
C) The graph is concave up on (0,e) and concave down on (e, $\infty$ ) .
D) The graph is a straight line.
E) The graph is concave down on (0,e) and concave up on (e, $\infty$ ) .