Definition: 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 connect speakers to your laptop [title] Choose a set of computer speakers. [step] As long as your laptop has a usb or speaker/headphone jack, you should be able to use most wired computer speakers. [substeps] Most computer speakers have a 3.5 mm (1/8 ") audio input connector, which is the small plug that will fit into a typical headphone jack. <sep> (A) These speakers will also need to be plugged into a power source. Usb speakers are powered by your computer so they won't need to be plugged into the wall. (B) Roll the speakers onto a plain flat, black hard wood table or mat. Once the speakers are on, plug in the speakers using either the usb, speaker, or adapter you chose, and wrap an electrical tape around the ends. (C) [title] Attach an ethernet cable to your speakers. [step] Figure out which end is turned on and which is off. (D) Iphone, ipad, and ipod are good options. [title] Get a usb or headphone jack from a hardware store.
Output:
A