Given:<br /> <img src="https://nimg.ppkao.com/2018-08/wenxueying/2018080111591755560.png?sign=e85d906a6da07b15958329dd1d906acc&t=62d04bc6" /><br /> Which two methods, inserted independently at line 17, correctly complete the Sales class?()
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; }