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: A group of people are in a gym playing dodgeball. a logo <sep> (A) appears and clears the tiles. (B) representing dartmouth appears, followed by other words. (C) appears on the screen. (D) shows up with arrows.
Example Output: C

Example Input: A white screen appears with colorful special effects that include a child's face a flying blue butterfly and colorful words that read "healthy child healthy world healthychild", another white screen appears with the words "healthy child tv healthy bytes". a woman <sep> (A) then appears wearing a front yard apron and proceeds to dodge a fly that flies after her. (B) is standing in a kitchen, and she begins to rub ingredients into cake pans, which she dumps onto the pan. (C) is now standing in a kitchen, words on the screen say her name is jennifer taggart and she's an eductional program specialist, and she's talking the whole time while demonstrating on how to measure ingredients and then she pours them into a clear glass bottle through a funnel. (D) is then shown painting nails and jacket or clothing on a blue paper piece styled with colors that begins with red and blue.
Example Output: C

Example Input: [header] How to use virtual personal training [title] Make a list of sites you like. [step] There are a great number of websites that offer virtual personal training, as well as mobile apps. While these have a number of similarities, you should be able to narrow them down based on your budget and personal fitness goals. <sep> (A) [title] Look into low cost virtual/certified trainers companies. [step] Several of the drawbacks of hiring virtual trainers is that instead of paying for their services, they do offer free routine training. (B) [substeps] If you know anyone who uses virtual personal training, ask them which site or app they use, and how their experience has been. If your budget, time constraints, and interests are similar to theirs, this can be a good way to find sites or apps that you might like. (C) [substeps] One popular site is freebaby.com. These sites offer virtual personal training internet and features matching your fitness goals. (D) [substeps] Before you start, make a list of some of the sites that will work best for you. Should you be able to start a training program on any given day, and then continually monitor your progress over time? Consider subscribing to amazon's online training program.
Example Output:
B