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".

[EX Q]: [header] How to unlock tracfone mobile phones [title] Call tracfone. [step] Contact customer service at 1-800-867-7183 between 8:00am and 11:45pm, eastern time (et), 7 days a week. [substeps] If you did not buy your phone through tracfone, it is likely unlocked already, and no code is needed. <sep> (A) When you call, ask how long it should be on your phone or get a confirmation email for garfield. [title] Run an internet search for " tracfone mobile phones. (B) Look for a white box containing the code " 192.168.0.1. " if you do not see the code on the box, then replace it with the united states exit code (). (C) [title] Request an unlock code for your phone. [step] The representative will verify that your phone and account meet all the necessary conditions to be unlocked. (D) If you receive a voicemail notifying you that a call was unsuccessful, call customer service at 1-800-627-4590. [title] Place a text message (optional) on each call.
[EX A]: C

[EX Q]: [header] How to stop picking your scabs [title] Disinfect the wound. [step] Open wounds and sores can develop infections. Always wash a new wound thoroughly with soap and water as soon as you obtain it. <sep> (A) Do not use hydrogen peroxide, petroleum or other deodorizers. Do not use antibacterial or antiseptic cleaners, as these may irritate the wound. (B) Then clean it up with an antiseptic wipe or a bit of neosporin and apply a bandage to protect it while it heals. You can also try using betadine or peroxide on the wound to clean and remove unwanted bacteria. (C) [substeps] Spread antibiotic ointment onto the wound, cover the wound with a sterile dressing that may be applied to the wound if it requires it. If you get a scab, wait 15 minutes to let the ointment finish fully absorbing in to the wound. (D) At least once every two weeks, take a shower or bath for seven to 10 days and splash your wound with warm water before applying bandages. Use soap with antibacterial properties and do not share it with others.
[EX A]: B

[EX Q]: [header] How to teach a dog to tell you when he wants to go outside [title] Hang a bell by the door. [step] Make sure the bell is within the dog's reach and is loud enough that you will hear it even if you are not in the same room. It's also important that it be durable enough that your dog won't break it. <sep> (A) You can buy bells with hollow hooks or find metal ones at your local hardware store. [substeps] If the bells are lost somewhere, hide them in a pocket or in a hidden room where no dog could find them. (B) [substeps] For this trick, stand in front of the bell, but don't sit in front of it. Cover it with your hands, as if it were a leash or blanket, and then start walking in the direction the sound will come from. (C) [substeps] You can also use a wireless doorbell, as long as your dog will be able to push to button. If your dogs seems afraid of the sound of the bell, try dampening it with some tape to make it quieter. (D) [substeps] Make sure the bell is positioned above the dog's head. Not only does that discourage the dog from jumping up to get it, but if the bell's head is above the dog's heart, this can result in the dog giving up.
[EX A]:
C