Identify the Intervals Where the Function Is Changing as Requested $( - 1,1 )$

Multiple Choice

Identify the intervals where the function is changing as requested.
-Constant

A) $( - 1,1 )$
B) $( 1,2 )$
C) $( - 2 , - 1 )$
D) $( 2 , \infty )$