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 change a upvc door lock [title] Identify the kind of lock you have. [step] There are different variations for upvc door locks, so initially, try to identify the brand of the lock on your door. Some common brands include avocet, fulltex gu ferco, mila, roto, and yale, just to name a few. <sep> (A) [substeps] Otherwise, try having someone walk in and lock your door for you. See if the locksmith can help you; by hiring someone else to do it, they should be able to reset it just like you can. (B) [title] Break the lock with a screwdriver. [step] After you have identified your specific brand of lock, breaking it by turning the screws in the opposite directions is the safest response. (C) [title] Check the expiration date on the door. [step] Some brand names will expire, so call the supplier after you check that model of lock. (D) Knowing the brand of the lock will help tremendously in finding a replacement lock. [substeps] Upvc door locking points can come in various styles (hook, deadbolt, pins, etc.
A:
D