Determine Where the Graph of the Function $f(x)=3+4 x^{1 / 3}$

Multiple Choice

Determine where the graph of the function $f(x) =3+4 x^{1 / 3}$ is concave upward and where it is concave downward. Also, find all inflection points of the function.

A) CU on $(-\infty, 0)$ , CD on $(0, \infty)$ ,
IP $(0,7)$
B) CU on $(-\infty, 0)$ , CD on $(0, \infty)$ ,
IP $(0,3)$
C) CU on $(0, \infty)$ , CD on $(-\infty, 0)$ ,
IP $(0,7)$
D) CU on $(0, \infty)$ , CD on $(-\infty, 0)$ ,
IP $(0,3)$