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 input: [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 output: D
Example explanation: This is a good example. Only option D is about Christmas trees. So, it's the correct option.
Q: [header] How to change child custody [title] Talk to the other parent. [step] If you are on good terms with the other parent, work together to adjust the parenting plan so that it suits both of your needs and the needs of your child. Print out your new, which you will need to submit to the judge. <sep> (A) Give the court your consent to the change of custody document and provide your california driver's license number and the other parent's social security number. [substeps] In the time that you work with the court, try to get close to the other parent a couple of times a week to discuss your child's custody. (B) [substeps] A child custody order can go into effect on its own, so be sure to check all your legal rights and meet with the clerk in court to set a date to get your request signed. Keep in mind that even if the judge says you were taken custody, his or her final order will be dismissed. (C) [substeps] Child custody decisions typically need to be modified every two or three years anyway as the child grows. Two parents who are able to come to an agreement rationally will have a much easier time co-parenting. (D) Then, meet with the parent to discuss exactly what changes you want to make and why. [substeps] Don't assume that your parents will change all the arrangements for you in the divorce or will only raise parts of the agreement.
A:
C