Initializing Array Elements With Loops

An array books has been declared to store Book objects. Which of the following code segments correctly initializes each element of the books array with a new Book object?

I.

for (Book b : books)
    b = new Book();

II.

for (int i = 0; i < books.length; i++)
    books[i] = new Book();

III.

for (Book b : books)
    books[b] = new Book();