The Largest Interval Over Which F Is Increasing for F(x) $\infty$

Multiple Choice

The largest interval over which f is increasing for f(x) = x³ - 6 is

A) (- $\infty$ , -6]
B) [6, $\infty$ )
C) (- $\infty$ , $\infty$ )
D) [-6, $\infty$ )
E) (- $\infty$ , 6]