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:
A man sits down by the sidewalk playing a guitar. A black man approaches to watch the guitarist perform. a woman <sep> (A) approaches to sing with them and they begin to have a conversation. (B) stands by recording the performer. (C) comes holding a guitar made out of materials. (D) at various functions watches on as the guitarist plays.

Ex Output:
B


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 make bunny tail truffles [title] Beat the cream cheese until it is fluffy. [step] Add an 8-ounce (225 g) package of cream cheese that's been softened to the bowl of a stand mixer. Insert the paddle attachment and beat the cream cheese on medium until it is light and fluffy, which should take approximately 30 seconds to 1 minute. <sep> (A) [substeps] You can soften the cream cheese by placing it in the microwave on a microwave-safe plate for 10 to 15 seconds. You can use a handheld electric mixer to mix the truffles if you prefer. (B) [title] Sift in the flour and stir through the truffles. [step] Add the flour to the cream cheese, and mix it in with the paddle attachment and the whisk attachment. (C) [substeps] The idea is to blend the cream cheese as it sits, and not alter the texture of the frosting while you're making it. [title] Scrape the flour and milk into a mixing bowl. (D) [substeps] You can also use the same method for cream cheese truffles but you can whip the cream cheese first so it's longer. [title] Beat 1 small egg yolk into the cream cheese.

Ex Output:

A