Mrs. Gomez is a mother to 2 boys. The number of children she has is three times the number of boys she has. Her children are planning to buy her a bouquet of flowers. What is the biggest bouquet they can buy in which the ratio of pink flowers to blue flowers matches the ratio of girls to boys if the florist has 9 blue carnations and 12 pink carnations left?
A. a bouquet of 12 flowers, 4 pink and 8 blue
B. a bouquet of 14 flowers, 8 pink and 6 blue
C. a bouquet of 15 flowers, 6 pink and 9 blue
D. a bouquet of 18 flowers, 12 pink and 6 blue
D.