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 ride the toronto subway [title] Use the ttc trip planner. [step] The toronto transit commission (ttc) offers a helpful trip planner on its website. Simply enter your starting point and destination into the appropriate fields, then set your departure or arrival time. <sep> (A) [substeps] To make the trip more convenient, you may enter new york city during the day. For a more convenient route, you can install a new york subway monitoring app on your phone or tablet. (B) [substeps] Search for your nearest ttc station and check for the train you'll be scheduled to take. If your train is local or you're traveling by car, check the transportation schedules and online signs to find one. (C) [substeps] Due to the poor travel times and tourist costs, ttc trips often take 30 minutes or less on weekdays and 45 minutes once throughout the week. Ttc only prolongs this travel time in the 21st century. (D) The planner will let you know which train to take and when to catch one that fits your schedule. [substeps] You can find the trip planner here: http: // ttc.ca/trip _ planner/index.

Ex Output:
D


Ex Input:
[header] How to start a good conversation [title] Make the person feel like you care. [step] You can turn a total stranger into a friend just by making him feel like you care about what he has to say and that his opinion matters to you. If the person thinks you're talking just to hear your own voice, he'll be turned off immediately. <sep> (A) Make sure to be yourself as well--it's important that you show the person your worth. [title] Make sure you're a good listener. (B) Just making the person feel like you really care about him will make him forget his feelings and will also show him you don't care what other people think about him. [substeps] Make it known that you do care about him without ever saying so. (C) Instead, turn your body and focus toward that person and maintain eye contact without being too intense. Give the person enough personal space, but show that the person has your attention. (D) Keeping your voice soft and sincere will instantly make the person feel at ease and thus more willing to start a conversation. [substeps] Remember that just because someone has said something nice to you, it's a verbal invitation, not a direct action.

Ex Output:
C


Ex Input:
[header] How to shoot a revolver [title] Learn the proper safety measures. [step] Before you even begin loading your revolver, you should read and comply with common gun safety measures. [substeps] Always keep the gun pointed in a safe direction. <sep> (A) Some modern guns can be fired at a lower elevation or lower. Some require you to stand approximately six inches above the gun after each shot. (B) If the gun is moving during the maneuver, the bullet may travel in the direction it is not intended to go. If you are using this method, you can learn which objects keep the gun pointed. (C) If you aren't sure where to shoot, bring a hat or dust mask with you when you get outdoors. To keep your gun safe while your mobility test class is cancelled, you should begin with this option. (D) A safe direction means that the gun is pointed in such a way that an accidental fire would not cause any harm. Obey the step until it becomes second nature to keep the gun pointed in a safe direction, even when you know the gun is unloaded.

Ex Output:

D