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". 

[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.
A

A gardener is shown trimming very tall bushes with a gas powered trimmer that he plugs in and gets ready. He turns a few dials and gets to cutting some more of the surrounding bushes. he <sep> (A) appears very happy with his efforts watching up close while clipping the very tall hedges that has a special effect. (B) trims up and down the length of them with precision and accuracy. (C) goes back and forth with the trimmer while still cutting the hydro leaves, trimming them with a hand cutting tool, cutting the bushes, and trimming them with a stone powered trimmer. (D) cuts straight through the beginning raking the leaves and an older man walks in and takes a look at the clipping.
B

[header] How to care for bleached blonde hair [title] Shampoo less frequently. [step] Shampoos are designed to remove dirt and oil from the hair, but they can also strip your hair's natural cuticle. Bleach does the same thing, so shampooing every day just layers damage. <sep> (A) It's best to start at the roots and work your way up from there. Adding more products as necessary reduces the amount of time you spend washing and moisturizing your hair and damaging it with shampoo, until your hair is no longer bleached blonde. (B) Long haired people with bleached hair may not enjoy having to wash and condition their hair once every two or three days. When possible, designate one day a week to shampoo your hair. (C) Think carefully about this before treating your hair with bleach, or you may end up causing more damage. [substeps] If you really want to keep your bleached hair as white as possible, shampoo more often. (D) [substeps] Wash your hair every three to four days, especially in the first few weeks. Buy a gentle dry shampoo to spray on your roots to stretch the time you can go between washes.

D