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 be a safe teenage driver [title] Make sure to stick to the speed limit. [step] Even if you are running late somewhere, don't speed. It's better to get to your destination a few minutes later than planned than to be in an accident. <sep> (A) [substeps] If you can, use the designated speed limit as the number one way to stay safe. Say, " i'm going to slow down and stop at a crosswalk or change lanes. (B) [substeps] Always turn off your lights before you get to your destination. Check your vehicle for brake dust after each turn, as white brake dust can be far from safe. (C) Not only could speeding cause an accident, but it could result in you getting a speeding ticket! [title] Use common sense. [step] Wear your seat belt no matter what, and make sure not to get caught up in any distractions while driving, such as texting. (D) [title] If you know the shortest route to your destination, your first step is to stay calm and drive slowly. [step] There is no need to panic if you are in a secluded area so stop no more than you expect.

Ex Output:
C

Ex Input:
[header] How to solo travel to vienna [title] Plan to stay in a hostel. [step] When traveling alone, it's always a good idea to stay at a hostel. Not only are hostels generally cheaper than hotels, this will help you meet people during your travels. <sep> (A) Taking advantage of free accommodations can help you pass the time and save money. [title] Plan initial backpackers getting used to the cities and customs of vienna on the flat travelling budget. (B) While there are many events you may enjoy alone, vienna has a booming nightlife. On occasion, you may want company for a night out, so a hostel is a good option for this. (C) It will also offer a safe, modern way to escape from the nightlife. An hostel is also a good place to set your budget on a day-to-day basis as you decide if you want to stay alone. (D) Search online for hostels near you if you want to take a trip somewhere you've never been, and plan to stick to the hostel's offerings. [substeps] The best traveling companions who are available in these places will be people who seem friendly, adventurous, and easily reunited from their long life.

Ex Output:
B

Ex Input:
[header] How to treat adhd with behavior therapy [title] Work with a behavior therapist. [step] A behavior therapist specializes in creating, modifying, and enforcing behavior plans. A behavior therapist can work with you (and/or your child) to create a plan that leads to better outcomes in behavior and productivity. <sep> (A) [title] Don't let your child go on a binge binge. [step] It is illegal to have a child eat if he is diagnosed with adhd. (B) A behavior therapist may work to modify responses to anger, use role playing, social skills modeling, and activities to promote focus. Meet with a behavior therapist to create a behavior plan and track progress over several weeks. (C) You or your child can use that plan to improve your behaviors and resolve problems. [substeps] Just because behaviors change, they can't be changed through acting out. (D) Psychotherapy helps both you and your child develop a behavior plan. [substeps] Therapy, such as cognitive behavioral therapy (cbt), works in tandem with cognitive behavioral therapy.

Ex Output:
B