5、指出下列程序运行的结果 ( )public class Example{String str=new String("good");char[]ch={'a','b','c'};public static void main(String args[]){Example ex=new Example();ex.change(ex.str,ex.ch);System.out.print(ex.str+" and ");System.out.print(ex.ch);}public void change(String str,char ch[]){str="test ok";ch[0]='g';}}
A. good and abc
B. good and gbc
C. test ok and abc
D. test ok and gbc