select all input values for which f(x) = 1

Good morning ☕️
_______
Answer:
The answers that apply are A (x=-2) and C (x=1),
____________________
Step-by-step explanation:
Actually , x= -2 apply because
If you look at the graph you will see that f(-2)=1.
See the point with coordinates (-2 , 1).
:)