下碳程序段的输出结果是( )。
class Test
public static void main(Srting 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 run()
displayOutput("t is running.");

A．t has been created.

B．t has been created.
t is running.

C．t is running.

D．编译出错