阅读下面程序public class Test2______ {public static void main(String[] args){Thread t=new

阅读下面程序 public class Test2______ { public static void main(String[] args){ Thread t=new Test2(); t. start(); } public void run(){ System. out. priatln("How are you. "); } } 在程序下画线处填入的正确的选项是

A．implements Thread

B．extends Runnable

C．implements Runnable

D．extends Thread