Write the ratio of circles to squares. make sure you simplify!

3 squares, 9 triangles, 5 circles.
answers:
A: 2:1, 2 to 1, 1/2
B: 3:9, 3 to 9, 3/9
C: 6:9 6 to 9, 6/9

The correct answer is:

C: 6:9, 6 to 9, 6/9