Instructions: 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".
Input: [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.
Output:
C