You will be given a definition of a task first, then some input of the task.
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 get another phone's call log [title] Determine which carrier your target phone uses. [step] You'll need this information in order to log onto the proper service provider page. Most phones display their carrier's name in the top left corner of the screen. <sep> (A) [title] Navigate to the carrier's website. [step] If the phone you're attempting to track is on a verizon network, for example, you'll need to go to the verizon website. (B) It will usually read " my carrier " or something similar. [substeps] Some mobile phones use an option called options, and this options is mostly for use only. (C) It is a square and has six numbers and the last number is for at least one carrier. [title] Check the type of carrier you are using. (D) You'll see this appear right below the line you're currently on. [substeps] There are a few carriers that only use bluetooth.
Output:
A