14. The graph of the polynomial function
$$y = a x ^ { 5 } + b x ^ { 4 } + c x ^ { 3 } + d x ^ { 2 } + e x + f$$
is sketched, where $a , b , c , d , e$ and $f$ are real constants with $a \neq 0$.
Which one of the following is not possible?
A The graph has two local minima and two local maxima.\\
B The graph has one local minimum and two local maxima.\\
C The graph has one local minimum and one local maximum.\\
D The graph has no local minima or local maxima.\\