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 Q]: [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 A]: A

[EX Q]: A man shows how to change a tube in a tire. he <sep> (A) puts a jack under the tube to lift it up. (B) puts a new tire on the tube. (C) takes the old tube out, puts the new one in, then pumps it up. (D) moves dirt covering the tube.
[EX A]: C

[EX Q]: [header] How to make cool weather minimalist running shoes [title] Gather the materials listed below. [title] Cut the leather down the middle so that you have one rectangle for one foot and one for the other. [title] Put on your socks if you don't have them on already. <sep> (A) [title] Lay out the shoe board so that you have two squares. [title] Put a piece of paper or two of cardboard across one of the squares. (B) [title] Put on your boots and flip your poncho over so that you have the strap. [title] Put on your socks and flip your poncho over so that you have the strap. (C) [title] Cut the leather into square strips that 8 inches wide and 8 inches deep. [title] Make sure your shoes are sealed with tape. (D) [title] Apply shoe goo as evenly as possible to the rough side of one of the leather rectangles. [step] Put newspapers down first to protect the surface beneath.
[EX A]:
D

