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 maintain good hygiene [title] Brush your teeth twice a day. [step] Even if you're in a hurry, brushing your teeth will remove bits of food, bacteria, and stains that can cause problems if left to fester. Try brushing once in the morning and once before you go to bed, and spend at least two minutes each time you brush. <sep> (A) [substeps] You can try to brush your teeth 3 times a day instead of more time, though. That'll increase the time by a bit. (B) It will keep you fresh the whole day. [substeps] If you are constantly on the go, have a travel toothbrush in you purse or briefcase so you can pop into the bathroom at work. (C) The more often you brush, the healthier your teeth will be. [substeps] If you haven't freshened your teeth for several weeks, brush again before bed. (D) [substeps] If you live in a clean house, try to brush regularly. Don't get dirty if your teeth feel dirty while brushing; that's a sign of bad breath.

Solution: B