21.
The table below shows some values of a function
x f(x)
0 -24
1 -13
2 -4
3 3
4 8
5 11
6 12
7 11
8 8
9 3

Which of the following BEST shows the values in the domain when the function is increasing?
A. between 0 and 6
B. between 3 and 9
C. between 3 and 6
D. between 6 and 9