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 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.
Example Output: C

Example Input: . four bikers at the start of the line <sep> (A) get no a jump. (B) are wearing different colors of uniforms and helmets, they are about to get start the race. (C) leave and race towards a parking lot on the right. (D) go on the parallel bars but they can't take off their bikes.
Example Output: B

Example Input: [header] How to determine if you should use dietary supplements [title] Ask your doctor about supplement interactions. [step] In general, multivitamins and minerals supplements can benefit most people; however, there are some conditions that can make it dangerous for you to take supplements. These conditions include kidney or liver disease, which may interfere with the processing of these vitamins and minerals. <sep> (A) Depending on the test results, there is a chance that you can encounter kidney, liver, or kidney problems. Talk to your doctor to find out if dietary supplements are correct in your area. (B) [substeps] From your health records, look closely to see what your weight is, how many milligrams are in each serving of each product, and whether you currently have any history of food allergies. Also think about interactions with medications in addition to vitamins. (C) Ask your doctor about the potential risks of these supplements and what they might entail. [substeps] Having a multi-vitamin or multivitamin deficiency can interfere with your daily intake of these vitamins. (D) Talk to your doctor about what supplements are good for you. [substeps] Some supplements interact with medications, so ask your doctor or pharmacist about possible interactions with any medications you already take, including prescription and over-the-counter drugs.
Example Output:
D