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 care for hair between salon trips [title] Buy a deep conditioner. [step] You probably already have shampoo and conditioner. The conditioner you use regularly does condition your hair as thoroughly as a deep conditioner. <sep> (A) A deep conditioner will make your hair appear softer, shiner, and healthier. It should only be used once a week. (B) However, you're willing to risk starting your hair oily or looking like a buck without a deep conditioner. Look for a deep conditioner made specifically for you hair at your local salon. (C) But you don't want to purchase a deep conditioner as any hair at all. Invest in a deep conditioner and make sure you use it daily. (D) Choose a deep conditioner, spritz it on your hair, then shampoo, then blow dry. You can simply apply the deep conditioner once a day and then continue rinsing to replace it over time.
Example Output: A

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 embed a sql query in microsoft excel [title] Go to data tab and select from other sources as shown in the screen shot below. [title] Select " from data connection wizard " in the drop down. [title] Data connection wizard will open. <sep> (A) [title] Click on the " current " tab. [title] Select " show current " in the pop-up to show the typical data analysis options. (B) [title] Resize the notepad to just short screen level. [title] Right click on the file from your data connection wizard. (C) [title] Enter all the entries entered in your sql query into the " + " field. [title] Type in the required keywords for each entry. (D) [step] Select " odbc dsn " from the available option and click " next ". [title] Connect to odbc data source window appears.
Example Output:
D