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 find a lost ipod [title] Understand the requirements. [step] You can use apple's location tracking service, " find my ipod ", on the ipod touch 3rd generation and newer. You must also be running ios 5 or newer. <sep> (A) [title] Open ios 8 on your iphone or ipad. [step] If you're mobile, you can log in with your apple id, and keep your device out of view to physically scan data if you no longer have an ios 4 or older. (B) You must also be a windows mobile phone model/user. [title] Search for a second ipod by clicking the icons below the introduction. (C) [substeps] Your computer library will instantly open, keeping all the data you have from your lost ipod on the desktop. Your usb memory will immediately be transferred to your ipod touch. (D) Find my ipod will not work on ipod shuffle, nano, or classic. [substeps] Find my ipod needs to be enabled before it can work.
Output:
D