An activity-based costing system is developed in four steps.

a. Compute the allocation rate for each activity.

b. Identify activities and estimate their total costs.

c. Identify the cost driver for each activity and then estimate the quantity of each driver's allocation base.

d. Allocate the indirect costs to the cost object.

Which of the following is the correct order of performing these steps? Select one:

A.b, a, c, dB.b, c, a, dC.a, b, c, dD.c, a, b, d