Assume that the following code compiles without error in a client of the Book class. What do you know about the Book class?

Assume that the following code compiles without error in a client of the Book class. What do you know about the Book class?

Book book1 = new Book("Secret Coders", "Gene Luen Yang");

Book book2 = new Book("Alan Turing: The Enigma", 2014);

1. The Book class has at least two constructors.
2. The author name is needed to construct a Book object.
3. Both the book title and publication year are required to construct a Book object.

 I only

 I and II only

 I and III only

 II and III only

 I, II, and III