Which two methods, inserted independently at line 17, correctly complete the Sales class? (Choose two.)

Given:

abstract public class Employee {
protected abstract double getSalesAmount();
public double getCommision() {
return getSalesAmount() * 0.15;
}
}
class Sales extends Employee {
17. // insert method here
}

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; }

Explanation:
A:
Main.java:17: getSalesAmount() in Sales cannot override getSalesAmount() in Employee; attempting to assign weaker access privileges; was protected
double getSalesAmount() { return 1230.45; }
^
1 error

B:
compiled successfully

C:
Main.java:17: getSalesAmount() in Sales cannot override getSalesAmount() in Employee; attempting to assign weaker access privileges; was protected
private double getSalesAmount() { return 1230.45; }
^
1 error

D:
compiled successfully