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".

A crowd is gathered around a black tiled area. a man in black <sep> (A) pants in front of the crowd runs a rope around a man's neck. (B) raws is talking to the camera. (C) shirt is on the middle of the circle. (D) does some breakdance moves.
D

[header] How to avoid common glass tile installation mistakes [title] Ensure color consistency behind glass tile. [substeps] Since glass can be the sole material in an installation, it is essential to choose a bonding mortar that meets its unique demands. In most cases, the color of the thin-set mortar was not an issue when installing opaque ceramic tile. <sep> (A) But with clear and translucent glass, the mortar appears through the tile: if the color varies in the mortar, it will in the glass tile too. To eliminate variations across a glass tile installation, choose a glass tile mortar with a bright white shade that is controlled to a consistent standard color. (B) [title] Find a masonry solution solution as described in this article. [step] Masonry solutions used to be sold in commercial suppliers were expensive and less durable than those containing glazed portions. (C) [title] Check your online repair and installation guide for common glass tile installation recommendations. [substeps] If you cannot find the recommended measurements, consult the manufacturer's website or consult the recommended supplies list. (D) Spray glass tile debris on the glass tile before continuing. Rinse glass tile debris with water and wipe the water away.
A

[header] How to deal with sharing a room with your sibling [title] Create physical boundaries. [step] For some siblings, it's enough to name what in the room belongs to which person. Others need physical reminders of the separation such as labels, dividers or even duct tape. <sep> (A) The room belongs to both of you, but being clear on which part is yours and which part is theirs will give you one less thing to argue about. If boundaries are a real issue, consider stringing a curtain across the room to divide it in half and give the illusion of privacy. (B) Make this an important part to establishing boundaries so that the two of you can effectively communicate things. [substeps] For example, maybe your sibling sleeps in his room and has problems getting out of bed, but you allow them to check their closet or keep things in the right place. (C) For more parent-friendly children, you can choose to give all of your room an individual designation. [substeps] If you have two boys and one sister at home, both of you need to make up a separate space. (D) The simple act of creating boundaries allows you to let your sibling know it's their space and not yours. [substeps] Oftentimes, siblings talk about what's the spot in the same room they are sharing.
A