Which of the following classes implements the java.

public class DemoThread implements Runnable, Cloneable {

public void run() { /* some code here */ }

protected boolean clone() throws CloneNotSupportedException { /* some code here */ }

. . . .

}

public class PrintData implements Runnable, Cloneable {

public void run() { /* some code here */ }

protected Object clone() throws CloneNotSupportedException { /* some code here */ }

. . . .

}

public class CloneCheck implements Runnable, Cloneable {

public int run() { /* some code here */ }

public Object clone() throws CloneNotSupportedException { /* some code here */ }

. . . .

}

public class Demo implements Runnable, Cloneable {

public void run() { /* some code here */ }

. . . .

}