Use the Table Below to Answer the Following Questions

Use the table below to answer the following questions.
Table 11.2.3
-Refer to Table 11.2.3,which gives the total cost schedule for Brenda's Balloon Shop,a perfectly competitive firm.The average fixed cost of producing the 4th balloon is

A) $4.30.
B) $4.80.
C) $4.70.
D) $4.50.
E) $1.00.