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".

Let me give you an 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.
The answer to this example can be: D
Here is why: This is a good example. Only option D is about Christmas trees. So, it's the correct option.

OK. solve this:
[header] How to spend an interesting summer (teens ) [title] Think about things you've always wanted to do, but didn't have time. [step] Summer time is the time to put them in action. Find out what would you like to do and enjoy! [title] Get in shape. <sep> (A) [step] Day to day life just gets boring, and hey, if you're ready for day to day life, get active! Have a shower every day, wash your face, and put on some bright clothes. Walk around a bit, or get yourself a bike. (B) [step] Getting fit is so important, especially for teen teens! Even just a little exercise a day can help you get fit. If you're not a runner or enjoy chasing after your parents, exercise can come naturally. (C) [step] Summer is also time to get fit. Why should we be lazy whole day long and do nothing? The early bird catches the worm. (D) [step] This is a very important step as you need the right mindset. It's also a good idea to consult a teacher about your progress as a teen, if you're struggling with body image! [title] Have good hygiene, brush your teeth, and make sure you exercise regularly.
Answer:
C