对于以下程序，Customer对象在第几行变为游离状态

admin

Customer  customer=new  Customer(  );    //line1
customer.setName("Tom");    //line2
Session  session1=sessionFactory.openSession(  );    //line3
Transaction  tx1  =  session1.beginTransaction(  );    //line4
session1.save(customer);    //line4
tx1.commit(  );    //line5
session1.close(  );  //line6
A、line6
B、line1  
C、line5
D、line3

moon110

A