单项选择题

下面程序段的输出结果是
class Test
public static void main(String args[])
MyThread t=new MyThread();
t.displayOutput("t has been createD) ";
t.start();
class MyThread extends Thread
public void displayOutput(String s)
System.out.println(s);

public void nm()
displayOutput("t is running. ");

A.t has been created.
t is running.
B.t has been created.
C.t is running.
D.编译出错