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 determine who has right of way [title] Come to a complete halt at a stop sign or red light. [step] At a stop sign, come to complete halt for about 2 seconds or until vehicles that arrived before you clear the intersection. If you're stopped at a red light, proceed when the light has turned green. <sep> (A) This will give you enough time to catch the light and clear the intersection. [substeps] Vehicles behind or behind you may not brake. (B) This blocks oncoming cars from passing you. [substeps] If in doubt, you can also tell if you're going too fast by looking ahead at the tires of that car. (C) If you are stopped before a red light signals for another vehicle, you're on your own. [substeps] This means every car crossed before you has passed, and every vehicle in the intersection has stopped before you. (D) If the intersection has a white stripe in your lane, stop before this line. [substeps] If you have a stop sign, but the street you're crossing does not have a stop sign, wait until all traffic has cleared before crossing the intersection.

Ex Output:
D


Ex Input:
Man is unning wearing stilts in a skaet park. another man <sep> (A) is intoeyete a line ofdifferent people playing stilts on the park. (B) is jumping along with the first man in the skate park. (C) is unhing a calf thnke its in stilts starting to run with them. (D) is unrolling accordions.

Ex Output:
B


Ex Input:
[header] How to fix a lost dental crown [title] Get the crown out of your mouth. [step] Carefully retrieve the crown from your mouth so that you do not drop it or swallow it. If you have already swallowed it, you are not in danger, but the crown will need to be replaced. <sep> (A) [title] Pull the crown off with your fingers. [step] Move the crown all the way out of your mouth. (B) See above for instructions on how to replace the crown. [substeps] It can be done by fastening a safety pin to either of the crown loops. (C) [substeps] If you are experiencing pain or minor discomfort in your mouth, the crown may be in your mouth when you first try to get your new teeth. If you are struggling to get the crown out, ask your dentist to repeat the process until you get the crown out of your mouth. (D) [substeps] If you have lost the crown, you can coat the tooth surface with an over-the-counter dental cement (available at many pharmacies) to temporarily seal the area until a dentist can repair it. [title] Call a dentist as soon as possible.

Ex Output:

D