Which two methods, inserted independently at line 17, correctly complete the Sales class?()<br /> <img src="https://nimg.ppkao.com/2018-08/zhoulian/2018080113342240957.jpg?sign=26f176086e67f96d19bc452caca665bf&t=62d4a5f7" />
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; }