67.Given: 10. abstract public class Employee { 11. protected abstract double getSalesAmount()； 12. public double getCommision() { 13. return getSalesAmount() * 0.15； 14. } 15. } 16. class Sales extends Employee { 17. //insert method here 18. } Which two methods, inserted independently at line 17, correctly complete the Sales class? (Choose two.)
(A) double getSalesAmount() { return 1230.45； }
(B) public double getSalesAmount() { return 1230.45； }
(C) private double getSalesAmount() { return 1230.45； }
(D) protected double getSalesAmount() { return 1230.45； }