public class Test{

public static void main(String[] args){

m(new GraduateStudent());

m(new Student());

m(new Person());

m(new Object());

}

public static void m(Person x){

System.out.println(x.toString());

}

}

class GraduateStudent extends Student {

public String toString(){ return GraduateStudent;}

}

class Student extends Person{

public String toString(){ return Student;}

}

class Person extends Object{

public String toString(){ return Person;}

}

Question 10 options:

	m(new Object()) causes an error
	m(new Person()) causes an error
	m(new Student()) causes an error
	m(new GraduateStudent()) causes an error