在Java中，如下代码创建一个新线程并启动线程: Runnable target=new MyRunnable(); Thread myThread=new Thread(target); 问:以下哪个类可以创建target对象，并能编译正确?
A.public class MyRunnable extends Runnable { public void run(){} }
B.public class MyRunnable extends Object { public void run() {} }
C.public class MyRunnable implements Runnable {public void run() {}}
D.public class MyRunnable implements Runnable {void run() {}}
正确答案是C