下列程序的输出结果为( )。 public class Reentrant p

问题：

下列程序的输出结果为( )。
public class Reentrant

public synchronized void a()

b();
System.out.println("here I am, in a()");

public synchronized void b()

System.out.println("here I am, in b()");

public static void main(String args[ ])

Reentrant r=new Reentrant();
r.a();

A．here I am, in a()/here I am, in b()

B．hereI am, in b()/here I am, in a()

C．here I am, in a()

D．here I am, in b()