The most common women's shoe size in the U.S. is reported to be an 8 1/2 A shoe store uses a table like the one below to decide how many pairs of size 8 1/2 shoes to buy when it places a shoe order from the shoe manufacturers.

Total Number of pairs of shoes being ordered Number pairs of size 11 1/2 to order
50 8
100 16
150 24
200 32

What is the ratio of the number of pairs of size 8 1/2 shoes the store orders to the total number of pairs of shoes being ordered?
A. 25:4
B. 4:46
C. 8:58
D. 4:25