单选题：指出下列程序的运行结果:

指出下列程序的运行结果:

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


答案：B