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 perform hip flexor stretches [title] Do a yoga camel pose. [step] In addition to stretching the hip flexors, the camel pose will open up the chest and increase the flexibility of the spine. The exercise tightens the waist and strengthens the arms and shoulders as well. <sep> (A) Yogis believe that this posture opens up your respiratory system so that you can take in more oxygen with each breath. They also believe that the exercise helps to open the heart chakra to allow you to feel more connected to the world and to bestow forgiveness where needed in your life. (B) Give yourself a break from the chair and let your head and neck rest against the top of your bar. [substeps] If you're feeling a little fatigued or fatigued, wait a few minutes to give your body time to rest. (C) To do a camel pose, lie down on the floor with your back straight and your feet placed on a park bench. Grip the bars with the weights in your hands. (D) Before attempting these poses, they should be done at home : [substeps] Kneel with your knees bent at a 90 degree angle. Put both of your feet together with your toes pointed in towards each other.

Ex Output:
A

Ex Input:
[header] How to recover deleted pictures from an ipad mini [title] Get your ipad mini's lightning cable. [step] This is the new 8-pin connector from iphone, which is significantly smaller than the previous one. Get this cable and connect the smaller end to your ipad mini. <sep> (A) [title] Hold down the home button on your ipad mini. [step] The process for locking the ipad mini to a computer is easiest with the ipad mini's lightning cable. (B) [title] Get the other end of the cable and plug it into any usb port of your computer. [step] You can plug it into any usb port located either at the back of a desktop cpu or along the sides of a laptop. (C) [title] Connect the smaller end to the power adapter cable. [step] This will work the same way as the icloud usb adapter, except that your ipad mini will have a smaller power adapter just at the back of its body. (D) Some great options are these : [substeps] Usb is for ipad mini micro usb cable. Connect each end to the launcher/usb port on your ipad mini.

Ex Output:
B

Ex Input:
[header] How to quickly multiply single digits by 9 [title] Remember that any number multiplied by 1 is the number itself. [step] No matter how tricky 9 is, it can't escape the fact that 1x9 will always equal 9. [title] Start simple and work your way up. <sep> (A) [step] If you're almost certain you know what you're doing, just jot down whatever you can think of. [substeps] Unless your calculations yourself require that you write them down first. (B) [step] Work your way up to 17 and you won't have a single digit. This will cause less confusion later! [title] Remember that most cell phones only have 14 digits. (C) [step] Don't try to multiply 9x9 before you learn 9x2 because it is a lot easier to think of math like a ladder. You should take each step to the top because if you try to skip steps you may just fall back and have to start over. (D) [step] You are at half the difficulty, meaning not even you can make the math as simple as you want it to be. In addition, there's a good chance that, once you understand fractions, you'll be able to figure out how to solve higher 9's with less work.

Ex Output:
C