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".

Input: Consider Input: [header] How to download microsoft office 2010 [title] Visit the office 2010 download page. [step] Microsoft office can be legally downloaded from microsoft's website as long as you have a valid 25-character product key. To find it easily, search for " using your office 2010 product key ". <sep> (A) [substeps] If you don't have a csso account, you may have to create one. You will need to verify your identity with microsoft office 2010. (B) [substeps] Office 2010 is no longer available for purchase or as a trial from microsoft. You can still buy boxed copies from other retailers. (C) [substeps] Leave one or more lines between the tabs on the homepage and the window you will be downloading to provide information about what you want to download. [title] Open the primary file you wish to download. (D) [title] Enter the windows code to install microsoft office 2010. [title] Click on the save file to run the pc then re-open microsoft office 2010 now to continue.

Output: B

Input: Consider Input: A girl flips and takes her turn then flips out of the center. A teen does a flip to the other side of the room. one of the teachers <sep> (A) comes and takes their places. (B) takes her turn next. (C) reaches down to help the girl who was standing up. (D) moves to the middle of the floor.

Output: D

Input: Consider Input: [header] How to keep a betta fish alive for 4 years [title] Choose your betta carefully. [step] Try supporting local businesses that take good care of their fish instead of big chain pet stores. Local pet store and online bettas usually have better genetics than the ones that come from the fish farms that supply pet store chains. <sep> (A) Genes play a large role in betta health. Young bettas are brightly colored and have long, flowing tails; as they get older, their colors dull. (B) If you live in the area, you could offer to help with some of the same but smaller purchases. If you can, find a place near you where you can get fish in your own home. (C) Instead, buy a popular, high quality freshwater fish. Large chain pet stores, like croatocross and craigslist, will generally have the best options. (D) [substeps] Do not buy betta fish that stay around larger chains, such as chain fish farms or buyers from towns like this. This is especially important if your shop is near an airport.
Output: A