The table shows the amount of green paint that can be added to different amounts of white paint while making a custom paint color:



Paint Color
Quarts of Green Paint Quarts of White Paint
3 6
4 8
5 10
6 12


Which statement is true about the ratio of green paint to white paint in the paint color?
A. It is 1:2.
B. It is 2:1.
C. It is 1:3.
D. It is 3:1.