单项选择题

阅读下面程序
public class Test implements Runnable
 public static void main(String[] args)
  ______
  t.start();
 
 public void run()
  System.out.println("Hello!");
 
程序中下画线处应填入的正确选项是

A.Test t=new Test();
B.Thread t=new Thread();
C.Thread t=new Thread(new Test());
D.Test t=new Thread();