以下程序的打印结果是

admin

Customer c1=(Customer)session.load(Customer.class,new Long(1));
Customer c2=(Customer)session.load(Customer.class,new Long(1));
System.out.println(c1==c2);
session.close();
A．运行出错，抛出异常
B．打印false
C．打印true
D．无输出