You are given a paragraph (Passage), a question (Question) and two answer options (Option1 and Option2). Your task is to find the correct answer (and return the string of the correct option, not option1/2) for the given question from the given options and based on the given passage. Answer of the question can be found directly from the passage.

Let me give you an example: Passage: Omelettes make a great breakfast , and I enjoy making them because they are very easy to cook . First , I get the eggs out and begin cracking them on the side of the bowl and dumping them into the bowl . I normally use two eggs whites and one whole egg to cut the calories . I add some salt and pepper to the mix for flavor . I pour the mixture into the hot frying pan . I make sure that I add some vegetable oil to the pan before I add the eggs though because I do n't want them to stick . As this occurs , I add some cheese or vegetable to the center of the egg mixture . Really , almost any type of cheese or vegetable makes a good omelette . I then flip one side of the omelette over on to itself to seal in the contents in the middle . It is then ready to serve ! Question: How many times is the omelette flipped? Option1: three times Option2: once
The answer to this example can be: once
Here is why: As mentioned in the passage that I then flip one side of the omelette; it is clear that omelette is flipped one time only.

OK. solve this:
Passage: I waited too long to start working on my report that was due for my class . I was in a hurry , and had to get some research material for the assignment . Sadly , one of the requirements for this report was to have a couple citations from a book instead of other articles that can easily be found on the internet . After I arrived I had to ask the librarian where they kept such books . It was a while since I have been in there . After finding the section . I carefully looked through the books that caught my eye and picked the book that I needed for my report . But not without paying an old book fee I had from a year ago . After I paid , I walked out with the book in hand ready to do some research . Question: What did they find at last? Option1: book for report Option2: requirements
Answer:
book for report