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". 

Example Input: [header] How to buy a light kit for photography [title] Make a list of required and/or desired criteria for your light kit. [step] These features include whether you want lights arranged on the floor or ceiling, what kind of photography you will be doing, how many lights you will need, etc. [substeps] Floor studio lights and backgrounds can be transported and arranged on stands or supports. <sep> (A) You may want several different lighting items in one kit. There are many available but most of the light hardware items, like dimmer switches and binders or small set of battery-powered lights, should be picked up at a craft store. (B) Pointed, straight, or one-sided lights can be divided into categories and arranged on tables or on poles. [title] Purchase fixtures that fit the gender and the type of lighting and coloring range that you want to consider. (C) Ceiling lights are more expensive and must be on a rail system for positioning in a rectangular area while background rollers are mounted on the ceiling. Your type of photography can determine how much light you need. (D) Frame sizes can be adjusted to your personal preference depending on the size of your studio. Don't forget to read the product description as well.
Example Output: C

Example 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.
Example Output: C

Example Input: [header] How to make hunch punch [title] Empty the bottle of everclear into a large container. [step] In a large container, empty an entire 750 ml bottle of everclear or another type of clear grain alcohol with a neutral flavor. A single bottle is sufficient for a small party of 10 or less, but if you're expecting a larger crowd, you'll want to use two or three bottles. <sep> (A) [substeps] Don't use regular high-strength everclear bottles-these will not absorb any of the alcohol. [title] Make a loop and drop it into the superfine liquid. (B) [substeps] Avoid using too much alcohol because the final product might be far too murky. [title] Dilute everclear with eight ounces of water, if desired. (C) [substeps] Traditionally, hunch punch is mixed in a 5 gallon (19 l) cooler. If using one, make sure that it's clean before pouring in the everclear. (D) [substeps] Bottled everclear alone is great, but regular everclear won't do the trick. [title] Make a four ounce scoop of everclear liqueur (ie.
Example Output:
C