A florist is making a flower bouquet for a client. The client wants the bouquet to have a ratio of 2 carnations to 5 peonies. Which of these bouquets meets the client's needs?
A. a bouquet of 2 carnations and 10 peonies
B. a bouquet of 4 carnations and 10 peonies
C. a bouquet of 4 carnations and 15 peonies
D. a bouquet of 2 carnations and 15 peonies