Which is the following statement true?

a$)f(x)$ is increasing in the interval $(-,0)$

$($b$)f(x)$ is decreasing in the interval $(2\frac{1}{4},)$

c$)f(x)$ has relative minimum at $x=-4$

d$)f(x)$ has point of inflection at $x=0$

e$)f(x)$ has relative minimum at $x=-3$

Which is the following statement false?

a$)f(x)$ is increasing in the interval $(-4,0)$

b$)f(x)$ is decreasing in the interval $(3,)$

c$)f(x)$ has relative maximum at $x=3$

d$)f(x)$ has relative minimum at $x=0$

C$.f(x)$ has horizontal point of inflection at $x=0$