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 make dead sea bath salts [title] Buy at least 1 lb. [step] ( 454 g) of dead sea salts. You can find these particular salts through online retailers and at some natural food or body care stores. <sep> (A) Call ahead to ensure they have what you are looking for. [title] Choose some essential oils to add to your bath salt mixture. (B) Typically, these salts will range from 120 to 140 grams per day. Lb: fresh sea salts are thinner than organic sea salts, making them more concentrated when mixed into bath or warm water. (C) [substeps] The lb is dried seaweed from a growing plant. Your sea salt comes from a plant, either live or dead. (D) [substeps] Lb salts are naturally salt-based, meaning they use a variety of ingredients. They are often sold in packs of 10 or 15.

Ex Output:
A


Ex Input:
There's a woman dressed in black playing billiards in front of some spectators. after she <sep> (A) knocks down 6 pins, a person comes and jack by. (B) finishes her game, she begins knocking down fifty and counts it. (C) 's done rolling the ball, she puts on a red shirt and grabs her purple racquet. (D) 's done another lady takes her turn and hits a few shots.

Ex Output:
D


Ex Input:
[header] How to maintain an m249 saw [title] Clear the firearm. [step] On fire mode, with your palm up, pull the cocking handle to the back and lock the bolt into place [title] Place your weapon back to safe mode. [title] Hold the charging handle, and then open the tray cover. <sep> (A) [title] Remove the ammunition belt from the feed tray. [title] Check the feed pawl assembly under the cover, and the feed tray assembly. (B) [title] Raise the bolt close to the chamber (this prevents the threat of fire from reaching the strike point). [step] Slide out the pistol and set it aside. (C) [title] Place your vehicle on a safe, relatively flat spot like a bike or sidewalk. [title] Slide the rear of the gun on the bike over the gear shift and back-up gear. (D) [title] Insert the phillips head screwdriver into the back, and turn it counterclockwise. [step] Once it's in, use your wrist to gently twist the prongs and release the screw.

Ex Output:

A