Determine Which of the Following Is Not True for the Graph

Multiple Choice

Determine which of the following is not true for the graph of $f ( x ) = x ^ { \frac { 2 } { 3 } }$

A) ƒ is continuous on $( - \infty , \infty )$ .
B) ƒ has no relative maximum.
C) ƒ has a relative minimum at x = 0.
D) ƒ has a point of inflection at x = 0.
E) ƒ is concave downward on $( 0 , \infty )$ .