Detailed Instructions: 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.
Q: Passage: I had a button pop off of my favorite blue shirt last week . I would n't be able to wear it with a button missing ; it would look rather silly . Luckily , the shirt had some extra buttons sewed on the inside . I took the button and put it on a sheet of white paper so it would stand out and I would n't lose it . Then I took a needle and thread . I guided the thread through the eye of the needle . Once it was through , I put the button against my shirt and went in and out with the needle and thread , alternating which hole I was piercing . I did this many many times , until I was confident the button would be on snugly . Then I tied off the thread with a stout knot to keep it in place , and cut away the extra thread . My shirt was ready to wear again . Question: What did they carefully cut? Option1: paper Option2: Extra thread
A:
Extra thread