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 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 help a friend cope with a breakup (for girls ) [title] Actively listen to your friend. [step] Active listening is an approach you can use to get the most out of your interaction with your friend. When you're actively engaged and communicating openly with your friend, you are showing your friend that you understand her feelings and are supportive of her. <sep> (A) This will also show your friend that you really mean what you say. Your friend may feel embarrassed or upset by this approach, and will likely move on her own. (B) Often when a breakup occurs, it can lead to feelings of loneliness and self-doubt. As a friend using active listening skills, you are communicating to your friend through actions that she is not alone and that value her thoughts and feelings. (C) [substeps] As you listen to your friend and get to know her better, you can start to practice listening in ways that engage her and build your friendship. There are several ways to actively listen to what your friend says, including: practice active listening on a regular basis. (D) If you make eye contact and nod in agreement, your friend is better able to hear you, she understands that you are understanding her and that you are empathizing with her. [substeps] Don't interrupt your friend when she is talking.
Example Output: B

Example Input: [header] How to unlock tracfone mobile phones [title] Call tracfone. [step] Contact customer service at 1-800-867-7183 between 8:00am and 11:45pm, eastern time (et), 7 days a week. [substeps] If you did not buy your phone through tracfone, it is likely unlocked already, and no code is needed. <sep> (A) When you call, ask how long it should be on your phone or get a confirmation email for garfield. [title] Run an internet search for " tracfone mobile phones. (B) Look for a white box containing the code " 192.168.0.1. " if you do not see the code on the box, then replace it with the united states exit code (). (C) [title] Request an unlock code for your phone. [step] The representative will verify that your phone and account meet all the necessary conditions to be unlocked. (D) If you receive a voicemail notifying you that a call was unsuccessful, call customer service at 1-800-627-4590. [title] Place a text message (optional) on each call.
Example Output:
C