关于以下程序哪条叙述正确?1. int j = 2;2. switch ( j ) {3. case 2:4. System.out.println (

关于以下程序哪条叙述正确？

1. int j = 2;

2. switch (j ) {

3. case 2:

4. System.out.println ("value is two");

5. case 2 + 1:

6. System.out.println ("value is three");

7. break;

8. default:

9. System.out.println("value is " + j);

10. break;

11. }

A. 第5行的表达式不合法;

B. 变量j是可接受的，switch中表达式可以是byte, short, int,或long的任何类型;

C. 输出为value is two

D. 输出是value is two 后跟value is three

E. 输出是value is two 后跟 value is 2

请帮忙给出正确答案和分析，谢谢！