15 POINTS

A housepainter mixed 5 gal of blue paint with every 9 gal of yellow paint in order to make a green paint. Which ratio of gallons of blue paint to gallons of yellow paint will make the same shade of green paint?

A. 10 : 45

B. 30 : 54

C. 6 : 10

D. 27 : 15
explanation if you know how to explain