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". 

[Q]: A black screen appears and the yellow words appear on them read "extreme how-to presents". The second black screen has yellow words that read "installing heated floor tile". a man <sep> (A) is now standing and talking in the corner of a residential home, dressed in a long sleeved button up black shirt, brown long pants, shoes and wearing a hat. (B) is installing the hardwood floors. (C) starts sweeping the floor in a position and putting gel between the tiles. (D) is shown attempting to installation tile in various rooms, including the top floor.
[A]: A


[Q]: [header] How to numb a tooth [title] Take an over-the-counter-painkiller. [step] A painkiller like ibuprofen or acetaminophen should be your first step in trying to numb a painful tooth. These painkillers will alleviate the pain from your tooth, and should also decrease any swelling in the infected area. <sep> (A) [substeps] If you are not able to find ibuprofen, you can opt for acetaminophen instead. [title] Freeze food that contains aspirin. (B) [substeps] Ibuprofen can be applied within 30 minutes to up the duration of an over-the-counter painkiller. Follow the manufacturer's instructions and do not take ibuprofen within 30 minutes after it has been applied. (C) [substeps] Make sure you read and follow the dosage on the packaging. Do not eat anything until told to do so by your dentist to ensure you are following the proper dosage. (D) These are all readily available at your local pharmacy. [substeps] If you're treating a toothache in a child younger than 18, do not give him or her aspirin.
[A]: D


[Q]: A woman is seen speaking to the camera while holding up a box. she <sep> (A) shows how to use the tool for various purposes, such as cutting parts. (B) opens the box and pulls out a pair of shoes. (C) then uses a knife to scissor open the box. (D) puts the box down and shows off a brush.
[A]:
B