A student has created a Book class. The class contains instance variables to represent the following.

$$ An int variable called pages to represent the number of pages

$$ A boolean variable called isHardcover to indicate whether the book is hardcover

Book has a constructor

public Book$($int pages, Boolean ishara$$aver$)$

implementation not shown

The client class makes the declaration

Book story new Book $(237,$ true$))$

Which one of the following descriptions is accurate?

An attribute of the object referenced by story is Book.

Book is an object, and story refers to a class

story refers to an instance of the class Book and Book is a primitive data type.

Book is static, and story refers to an object.

story refers to an instance of the class Book and pages is an attribute of the object referred to by story.