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 make iranian bread [title] Mix together the yeast and the lukewarm water, then let stand for 5 minutes. [title] Combine the salt and flour, then add to the yeast and water mixture, mixing everything together thoroughly. [title] Knead the dough until it's very smooth. <sep> (A) [title] Pour the dough into a pre-floured loaf pan. [step] Leave room in the pan for the butter. (B) [title] Cut it into small pieces, form it in a bread bowl, etc. [step] And cover with a bit of water. (C) [step] You can choose to mix it in a standing mixer (which will take about 6-7 minutes), or to knead the dough by hand on a floured surface. [title] Coat the inside of a bowl with about 1 tsp of oil. (D) [title] Cut the dough into the shape of a muffin with the slits cut before fully closing. [title] Place the dough on your prepared muffin tray.

Ex Output:
C

Ex Input:
[header] How to set up a caique parrot habitat [title] Choose a large cage. [step] Although the caique is a medium-sized bird, it needs a great deal of space. Select a cage that can accommodate this energetic parrot. <sep> (A) New cages tend to have more cages that are more hearty and safe, as these should not be bigger than 20 square feet (36 square meters) on all sides. If you're keeping a senior parrot, choose a caique that has built in cage work. (B) When it comes to caique cages, bigger is always better. [substeps] The smallest cage for a single caique should be 24 x 24 x 24 inches (60 x 60 x 60 cm). (C) The standard size for caique quarlings are 4 inches (10 cm) and five feet wide. Add a basking bulb, separate the block of wood with coarse wood shavings and place the bottom on a cooled to room temperature examination table. (D) For a more fluid experience, a small cage that you can comfortably surround your bird in will help to make the experience more comfortable. [substeps] A second enclosure can provide the environment your bird will be inhabiting without having to create a constant environment, changing its structure and its oxygen levels.

Ex Output:
B

Ex Input:
[header] How to get rid of stretch marks at home [title] Eat plenty of foods that contain vitamin c, if you are gaining weight, growing quickly or pregnant. [step] Some studies show that vitamin c boosts collagen production so your skin can repair itself. [title] Consider taking a vitamin c supplement if you are not pregnant. <sep> (A) [step] Vitamin c is found in foods rich in it. You can take one supplement every 1 week or better every 2 to 4 weeks for up to 7 days. (B) [step] Vitamin c is a natural supplement and may help promote scar formation. [title] Check with your doctor if you are on blood thinners or taking milk. (C) [step] A capsule of 500 mg may help prevent and improve stretch marks. [substeps] If you are pregnant, you should consult with your pediatrician before taking any supplements. (D) [step] Vitamin c is the safest serum for collagen build up and is roughly 10 %. Both the us and the uk provide a variety of supplements for pregnant women.

Ex Output:
C