Which change can you make to Target without affecting Client?()<br /> <img src="https://nimg.ppkao.com/2018-08/zhoulian/2018080115531973407.jpg?sign=0f619b3eeb263a331f7209445e019dae&t=62d14fe6" />
A、Line 4 of class Target can be changed to return i++;
B、Line 2 of class Target can be changed to private int i = 1;
C、Line 3 of class Target can be changed to private int addOne(){};
D、Line 2 of class Target can be changed to private Integer i = 0;