The bar graph below shows the sale of books (in thousands) from five branches of a publishing company during 2008 and 2009.
What is the ratio of the total sale of books from the branches B1, B2 and BS in 2009 to the total sale of books from the branches B2, B3, B4 and B5 in 2008?
A32 : 45
B45 : 5
C39 : 47
D45 : 32
