Which function has the greatest constant of variation?


A
x
8
9
10
11
y
20
22.5
25
27.5



B
x
1
2
3
4
y
3.2
6.4
9.6
12.8




C
On coordinate plane C, a line goes through points (0, 0) and (3, 1).




D
On coordinate plane D, a line goes through points (0, 0) and (1, 2).

A
B
C
D