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()