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 relieve constipation after surgery [title] Use a stool softener. [step] One of the first medications to try if you're feeling constipated is a stool softener. These are easy to find over-the-counter and can help get you back on track. <sep> (A) [substeps] The way that stool softeners work is that they draw water into your stool from your intestines. This makes your stool softer and easier to pass. (B) [title] Take 600ml of stool softener before a meal. [step] Most stool softeners kill the production of prostaglandins. (C) [substeps] One good option for relieving constipation at the time of surgery is a stool softener. While stool softeners do provide temporary relief from constipation, they are expensive and will often disappoint you. (D) These medications are named for their antioxidant properties, which help reduce diarrhea and keep your stools from becoming irritated. [substeps] Remember that: the next time you're using an over the counter stool softener treatment, be sure to follow the dosing instructions.

Ex Output:
A


Ex Input:
Two men are doing martial arts with others around them watching. Many other men are shown doing several flips and tricks around each other. two men <sep> (A) are shown hitting people to give them an out and another man joins in. (B) are joined by a woman. (C) flip near each other while others around them watch. (D) stand on a mat while a man is bartending around them.

Ex Output:
C


Ex Input:
[header] How to get reflexology charts [title] Explore multiple websites and compare the charts. [step] Some charts don't show the organs at all and are not very detailed. It's best to look for charts with the most details. <sep> (A) In some websites, you can look at chart book's planets, so that you can locate them. On others, the charts do not show all of the planets. (B) Most charts are' about' rather than' about'. This will give you a better idea of what you are looking for. (C) [title] Look for foot and hand reflexology charts that show all views of the feet and hands, not just the bottoms of the feet or the palms of the hands. [step] There are reflex points on the tops and sides of your feet and hands, and it will help you to see all the points on all the surfaces of your feet and hands. (D) So when you see a chart with the largest organs, check that particular column. If you are looking on a chart with omniscient bugs, try to find columns on another group of charts which are more detailed.

Ex Output:

C