What Can You Say About Point of Inflation For $f(x)=x e^{-3 x}$

Multiple Choice

What can you say about point of inflation for $f(x) =x e^{-3 x}$ ?

A) point of inflation gets closer to $\pm$ 6
B) point of inflation goes away from the origin
C) point of inflation gets closer to the origin
D) point of inflation goes away from $\pm$ 3