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".
Example: [header] How to create a christmas tree forest [title] Consider the type of tree you want to plant. [step] There are a wide variety of christmas trees and include fir, pine, spruce, cypress, and cedar. These trees thrive in different climates and look different from one another. <sep> (A) It is important to research the tree before setting up your tree to try it out to make sure you can write the tree's growing season so that you can get the most supplies you need. If you're just interested in having a tree stand out, then make sure to check for the following : [substeps] Spruce trees. (B) [substeps] Trees green may be used in a mix of green and evergreen. Greens, such as pintos and olive oil, may be more delicate than these. (C) Where the trees grow together is up to you. [substeps] Spruce trees light up the night for hours in the morning and drown out the morning sunrise between afternoons. (D) Think about where your tree forest will be located and choose a tree that can thrive in that climate. [substeps] Balsam firs are a popular christmas tree species that grow in the northern united states and canada, in hardiness zones 3-5 or states like minnesota, north dakota, and montana.
Example solution: D
Example explanation: This is a good example. Only option D is about Christmas trees. So, it's the correct option.

Problem: [header] How to recover from a hamstring injury [title] Visit your doctor if the injury is severe. [step] Hamstring injuries are often minor, but they can be very serious. Sometimes the muscle tears away from the bone. <sep> (A) This can lead to staples dislocations and broken bones. Talk to your doctor before you exercise for signs of damage : [substeps] Blood in the urine: your urine could be infected with bacteria or cause unnecessary pressure to the affected area. (B) If the damage appears to be severe, that's a sign to get medical attention. [substeps] If the injury is spreading to specific parts of the tissue in the leg, he will have to provide you with an iv needle or x-rays to prevent it from spreading to other parts of the body. (C) You may have muscle that is simply no longer there or that is coming back. [substeps] If your injury is a muscle fracture, such as a sprain or fracture in the knee, you are at greater risk for complications. (D) Your doctor can make the best determination about your injury and provide you with a treatment plan. [substeps] See your doctor immediately if you hear tearing, experience extreme pain and swelling, or see bruising around the area.
Solution: D