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 treat ingrown eyelids in dogs [title] Look for squinting. [step] Squinting is an easily recognized sign of eye irritation. Your dog may squint if it feels like there's something in the eye that it can't get out. <sep> (A) In this case, the ingrown eyelid is causing the eyelashes to rub directly against the eye. If you can't tell if your dog is squinting, compare the size of your dog's irritated eye to the other one. (B) This is not always an indication of eye irritation. It's often the case that tears will build up within the eyelids, which can cause the eyes to appear unfocused and dry. (C) It may also display its eyelids twitching or blinking repeatedly. Some dog owners find it embarrassing to have their dog squint because of its inability to see. (D) Visit your vet if you notice : [substeps] Squinting irritation blockage of the eye. This is the case with retinitis, which causes squinting.

Ex Output:
A


Ex Input:
[header] How to buy common stock [title] Find an online broker. [step] The easiest way to work with a broker today is online. You'll open an account with the broker and then deposit money into the account. <sep> (A) When you receive money back, you can make your payments without a current account. Brokers are licensed to do large, complex transactions, so don't hesitate to go to a broker if you are buying large amounts of stock. (B) Then you can search online for those stocks you're interested in investing in. [substeps] Some financial brokers you may consider are miller, a&m, airchat, and bankrise. (C) You can find online brokers by searching online. Some of the more popular include the following : [substeps] Charles schwab e * trade td ameritrade optionshouse [title] Identify if you want a full-service broker instead. (D) Most brokers offer deals to you either on your own or at low interest rates. However, if you don't have an online broker, you should look at a few online brokerages in your area.

Ex Output:
C


Ex Input:
[header] How to cook aubergine [title] Wash the aubergine thoroughly. [step] Check for brown spots or bruises. If the skin is in good shape, it is edible, though some varieties have skin that is too tough to eat. <sep> (A) [title] Remove the leaves from the aubergine and wash them, except for the shoots. [step] Make sure to wash the leaves through a sieve before cutting, then dry them. (B) You may want to save the aubergine for later baking by storing it in the refrigerator. Alternatively, you can peel the skin off. (C) Rinse the aubergine under running water. [substeps] If the flesh is flaky and brown to the touch, then it is inedible. (D) Peel the skin with a vegetable peeler if you think it's wise-younger aubergine skin is fine to eat, but older, more ripened aubergine skin has a bitter taste. Cut off the stem and base, too.

Ex Output:

D