以下选项中循环结构合法的是( )

A. int j=0;do{System.out.println("j is "+j);if(j==3){break;}}while(j<10)
B. while (int i<7) { i++; System.out.println(“i is“+i); }
C. int j=0;for(int k=0; j + k !=10; j++,k++) { System.out.println(“ j is “+j+ “ k is ”+ k); }
D. int j=3;while(j); { System.out.println(“ j is“+j); }