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". 

[EX Q]: [header] How to avoid the stomach flu [title] Wash your hands often. [step] Wash your hands carefully with soap and water for at least 20 seconds. Always wash your hands after going to the washroom and before and after handling food and eating. <sep> (A) Washing your hands is important, since if the way you handle and eat is bad (germs, bacteria, etc. ), your best chance at preventing the flu is by keeping your hands clean. (B) Don't attempt to dry or clean your hands on something other than a business table. [title] Wear long pants (not utility pants to wear running shoes with). (C) [substeps] It's a good idea to wash your hands between-and as many times as you go to the bathroom. This will help prevent an episode of nausea in the future, as well as allow your body time to shut down its internal defenses to fight off food, germs, and viruses. (D) This will help to prevent the spread of germs. Germs on your hands can get into your eyes, ears, and nose and make you sick.
[EX A]: D

[EX Q]: [header] How to visit the top 10 tourist destinations in london [title] If you are planning to visit london why not try visiting the following must-see places? [title] Visit the british museum at great russell street. The british museum's art collection includes artworks from all over the world. [step] The british museum houses the rosetta stone, sculptures from parthenon, and the portland vase. <sep> (A) Visit art galleries, amazing places, and places which you have never been. [substeps] Do not forget to ask for drivers from the london lights station, trinity quarter , 121 lights avenue-this is the only modern route to london. (B) The british museum is considered as one of the best in the world and it was established in 1753 via the act of parliament. The first collections were from sir hans sloane. (C) They are also accessible by either gps or facebook. [substeps] If you are going to the london museum, press the' get started' button. (D) Occasionally you may see art museums in london that serve as places to observe british history-like the australian museum. [title] Then take the ferry from oxford to mcdonald's, the capital city of london.
[EX A]: B

[EX Q]: [header] How to decorate with alien cocoons for halloween [title] Create a backdrop for your lair, unless your walls look creepy enough to show through. [step] Lay out a roll of dark paper or fabric large enough to cover your space, and spray paint them to add dimension and give them the color you want. [title] Cut and hang the backdrop. <sep> (A) [step] This is like wallpapering, only not as precise or sturdy. Measure the height of your walls and cut sheets three or four inches longer off your prepared paper or cloth. (B) [step] Use clear, stretchy hanging string and needle-nose pliers to fasten the hanging string where you want it to end. [title] Cover each space in the modular puzzle unit with duct tape. (C) [step] Cut out long pieces of black paper, like cardboard, and glue them to the sides of your domed ceiling to look like planets. [substeps] Alternatively, you can paint the ceiling with white paint and glue it on with a super hot glue gun and laser paint. (D) [step] Tape them in a style of your choosing, and if you want a more realistic look, take the tape off before you secure them with a button or ribbon. [title] Set the scene with a magic halogen light to make your room glow.
[EX A]:
A