public class Employee{      
private String name； 
public Employee（String name）{          
this.name = name；      } 
public void display（）{        
System.out.print（name）；      } } 
public class Manager extends Employee{      
private String department； 
public Manager（String name，String department）{         
super（name）； 
this.department = department； 
} 
public void display（）{ 
System.out.println（super.display（）+”，”+department）；      } } 
执行语句new Manager（“smith”，”SALES”）后程序的输出是哪项？（） 

A. smith，SALES
B. null，SALES
C. smith，null
D. null，null
E. 编译错误