【单选题】
public class Person { <br /> private name； <br /> public Person（String name） { <br /> this.name = name； <br /> } <br /> public boolean equals（Object o） { <br /> if（ !o instanceof Person ） return false； <br /> Person p = （Person） o； <br /> return p.name.equals（this.name）； <br /> } <br /> } <br /> Which is true？（） 
A、 Compilation fails because the hashCode method is not overridden.
B、 A HashSet could contain multiple Person objects with the same name.
C、 All Person objects will have the same hash code because the hashCode method is not overridden.
D、 If a HashSet contains more than one Person object with name=”Fred”， then removing another person， also with name=”Fred”， will remove them all.
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