【单选题】
1. public class Target { <br /> 2. private int i = 0； <br /> 3. public int addOne（） { <br /> 4. return ++i； <br /> 5. } <br /> 6. } <br /> And： <br /> 1. public class Client { <br /> 2. public static void main（String[] args） { <br /> 3. System.out.println（new Target（）.addOne（））； <br /> 4. } <br /> 5. } <br /> Which change can you make to Target without affecting Client？（） 
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；
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