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 Input:
[header] How to make marijuana tea [title] Grind the marijuana buds. [step] Separate out the stems and seeds if necessary, and use a grinder or chop up the buds with a sharp knife until they're finely chopped, but not completely powdered. [title] Mix the buds with butter. <sep> (A) [step] Place them together in a bowl and use a spoon to mix up the buds and butter, making sure each piece is coated with fat. You want the grounds to be completely coated, but not soaked in butter; too much will inhibit the release of thc. (B) [step] Combine two tablespoons (59.6 ml) of butter with 1 teaspoon (4 g) of ground black pepper. Spread this mixture over the marijuana buds, and let it sit for several minutes. (C) [step] Pour the liquid ingredients from the grinder into a blender or food processor, then pulse the contents until well mixed. [title] Punch holes in the buds with a fork. (D) [step] Pour the softened butter into the potting mix. Press the buds down with your finger to blend them together without flaking off.

Ex Output:
A


Ex Input:
[header] How to buy a last minute cheap flight [title] Check airline newsletters, websites that specialize in last minute air travel and the travel section of your local newspaper to find last minute deals on flights. [step] Sometimes you can save money by booking flights late because airlines that have not filled their planes will offer discount fares. [title] Compare airfares from different airlines, websites and travel agencies. <sep> (A) [step] Look at every airline's website so that you can compare and contrast prices. [title] Opt for free flights as before, otherwise follow the full booking program and you'll not miss your flight in a long time. (B) [step] Try booking flights from big-ticket airlines such as kiwi airlines and delta. [title] Compare prices from travel agencies that are offering cheaper flights. (C) [step] Purchasing flights directly from the airline is not always the cheapest deal, so check out a few different travel websites and travel agencies to compare prices. [title] Search for flights during undesirable days and times. (D) [step] Compare each airline's prices with the prices you are interested in. You might be able to find a cheaper flight for free.

Ex Output:
C


Ex Input:
[header] How to clean a tile roof [title] Wear non-slip shoes with good traction. [step] Tiles get slippery, especially once they are wet and covered in a cleaning treatment. Wear shoes with good grip on the soles, such as athletic shoes, to help you maintain your balance as you work. <sep> (A) [substeps] For example, slip-soled shoes with great traction at least halfway up the foot are good. If you are working in kitchens with people shouting or doing other noises, wear more secure footwear, such as deep-soled sneakers, and keep your feet firmly planted on the floor. (B) [substeps] Avoid wearing flip-flops or other slip-on shoes without good traction. Additionally, it's a good idea to wear old clothes, rubber gloves and eye protection. (C) [substeps] Running shoes, high-quality sneakers may help you stay balanced during the cleaning process. [title] Wash the tiles with soapy water to avoid scuffing or applying extra dirt. (D) [substeps] In a pinch, you can also use rubber trainers, which work well. You can also help a tile roofing specialist lift the roof by placing flexible tabs around the tops.

Ex Output:

B