Q: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
[header] How to make an ironing board cover from scratch [title] If your foam underneath is ripped or scruffy, you should replace that as well. [step] One thing that you can try is upholstery wadding underneath. [title] Untie the cord from underneath the existing cover (it is probably wrapped around a plastic toggle. <sep> (A) [step] ) when you make sure no one is looking at the cover, undo it by running a clean knife over the cover. [title] Just ease out and see what you've done right! [step] It is pretty easy now. (B) [step] So if it is tied when you unscrew it that is quite difficult and it might break from being so loose over time, give it a rest until you can continue. ) [title] Wrap all 4 edges tightly on top of the cover, without leaving any gaps. (C) [step] ) [title] Loosen the screw on the compartment where it comes out. [step] You should notice why this takes a lot of work. (D) [step] If it is, good, you have half of your materials already). Pull all the string out, and stretch the cover out flat.
A:
D