身上着火，应尽力奔跑。

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()