下列程序通过实现Runnable接口创建一个线程，选择正确的语句填入程序的横线处。class MyRun implements Runnable{ String str; MyRun(String s) { str = s; } public void run() System.out.println(str); }}public class ex40{ public static void main(String[] args) { String name = "实现阶段Runnable 接口"; MyRun my = new MyRun(name); Thread th = th. start ( ); }}

A．new MyRun(m

B．new Thread()

C．new Thread(m

D．Thread(m