Refer to the exhibit to answer the question.

Currently, the Person class is designed as shown in the Exhibit, with employees being paid a base
salary. New requirements are being added to pay bonuses to managers and commissions to
salespeople, leaving developers being paid a base salary as before. Which of the following is the
BEST refactoring of the system to provide greatest flexibility?

A.
Associate the Person with EmployeeRole specializations, moving the payAmount( ) method as
shown in C.

B.
Replace the Person class with Developer, Salesman, and Manager classes, writing specific
payAmount( ) methods as shown in

C.
Extend the Person class and payAmount( ) method as shown in A.

D.
Create Developer, Salesman, and Manager specializations of the Person class, writing specific
payAmount( ) methods as shown in D.