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();