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". 

Ex Input:
[header] How to read an ear reflexology chart [title] Get an ear reflexology chart online or refer to one in a book. [step] Before you can learn how to read an ear reflexology chart, you will need to get yourself a good one to consult. You can find ear reflexology charts online or in a reflexology book. <sep> (A) For best results, get a large poster size chart. The ear has 90 standardized reflexology points, so it can be difficult to read an ear reflexology chart if it is too small. (B) Read the chart aloud to yourself in the living room or in the shower, if you don't have a room to study in. [title] Read the chart in a library or in an online book. (C) [substeps] You will also need to see if any glaciers are present. These may be signs of a temperature problem. (D) [substeps] Place your index (pointer) finger on one of the pointer points at the top of a chart. Place your other finger on the other pointer point at the bottom of the chart.

Ex Output:
A


Ex Input:
[header] How to recover from an active sysprep (any windows os ) [title] Assuming your machine cannot boot into windows, insert your installation disc and boot into that. [title] When disc finishes loading select your language and hit next. [title] Click the repair tools or repair my machine on the bottom left hand corner. <sep> (A) [title] After the repair is done, open system preferences in windows xp and select system repair options by clicking load item then system tools. [title] To reboot system preferences select wipe device from system panel. (B) [title] There you can see-the difference between sysprep's system is that he uses the system repair disc and the os version of windows. [title] Repeat the process for all type of windows os if you haven't already; make sure you don't install more than half a batch. (C) [title] After windows is fully installed, select your system or game driver and click properties-] system settings-] installing device. [title] Click continue if required then click next. (D) [title] It will now search for an installed operating system. [step] If nothing shows up you will need to download the storage device drivers for your machines from the manufacturer's web site, put them on a usb flash drive, and click load drivers button.

Ex Output:
D


Ex Input:
[header] How to flush power steering fluid [title] Check your owner's manual for the recommended power steering flush schedule. [step] Your power steering system is actually remarkable at staying clean. That said, over time natural wear and tear will cause bits of rubber, plastic, and dirt to enter the fluid, and this can cause problems to the entire system if the fluid is not flushed. <sep> (A) Each car has it's own suggested interval after which you should change the fluid, so look up your model's time frame. [substeps] For high-end cars, you should consider replacing the fluid every 35-40 thousand miles. (B) [substeps] To flush your car, you would just press the " 3 " button to start your car. This button is located on the left side of the dashboard. (C) Not to mention that your keys may fall out of the system while you are driving. Make sure your tires can pump without fixing your tires to fast as they will be the next time you drive. (D) Check your user manual for the recommended flushing schedule. You will want to start with the range that the highest range on (vst) is, and go from there to lukewarm water.

Ex Output:

A