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: We see the man sitting on the floor talking to a camera. We see the man illustrating break dance moves. The man is talking and sitting still. we <sep> (A) see the man walking through the crowd at room 15 taking pictures. (B) see the man dance fast. (C) see the closing screen and a lady walks into frame. (D) see the following title screen.
Example Output: B

Example Input: [header] How to treat cold sores in your nose [title] Figure out if you have cold sores in your nose. [step] Because it is difficult to see inside of your nose, you may need to figure out if you have cold sore instead of another condition such as an ingrown hair or pimple. Checking the areas in and around your nose can help you figure out if you have cold sores in your nose. <sep> (A) [substeps] Check your nose from the bottom of your nose, just in front of your cheekbone, towards your chin. If it feels numb, there is probably something there. (B) [title] Determine if you have a stuffy nose. [step] In your nose, you may need to take some pressure off of the bridge of your nose and see if that pressure is gone or causes the discomfort. (C) [substeps] Use a mirror to check the visible surfaces of your nasal cavity. You may not be able to see much, but even detecting a cold sore can help. (D) [substeps] To figure out if you have cold sores, you may be looking in your nose. Either look back at the corner of your nose, or look to the floor.
Example Output: C

Example Input: [header] How to set up a grid tied pv system at home [title] Consider how much electricity your family really needs each day or month. [step] This is important because the system includes a few solar panels and each of them has a certain amount of capacity in generating electricity. If you have a clear calculation of this problem, you won't waste your budget for purchasing these panels or buy less than needed. <sep> (A) A good system is able to produce at least 2 or 3 lights. It may (and sometimes) be enough to keep your line charging at about 200 iu or 180 usd. (B) If you want them to grow and produce faster, you'll need a system that requires a constant constant supply of electricity. The amount of electricity the individual physical systems need depends completely on how fast they are developing. (C) [title] Make sure you have a certain amount of cables to be used to connect the grid and pv systems. [step] This will need to be the maximum connection from the other solar panels. (D) Maybe you don't know about how much electricity your family needs each day or month because you just pay the bill with money. This time you can check out this figure by viewing the power meter installed in your house.
Example Output:
D