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 transport breast milk [title] Ask about the terms of transport. [step] If you are sending your breast milk to a company, such as a breast milk bank, ask in advance about the terms of transport. Questions to ask include : [substeps] When does the milk need to arrive? How long can it take to get there? Does the company accept milk packed with dry ice? If so, in what quantity? [title] Use fresh milk. <sep> (A) [step] Milk is changed on a daily basis. Most manufacturers now sell their new milk cold, rather than reheating it in the microwave. (B) [step] Do not store a whole breast of milk in the microwave. Instead, fill a jug filled with fresh milk and microwave it on high heat for 30 to 60 seconds. (C) [step] You can find fresh milk in some commercial stores in bulk. Be careful of doing so; it may cost a considerable amount of money. (D) [step] If you are going to ship breast milk, make sure it is fresh. Either pump it immediately before mailing, or remove the correct amount from the freezer.

Ex Output:
D

Ex Input:
[header] How to prepare for the gre in psychology [title] Familiarize yourself with the structure of the test. [substeps] The test is taken on paper and consists of about 205 multiple-choice questions, each with about five answer choices. Some questions are grouped together around a graph or experiment summary. <sep> (A) Your final score is scaled and will range from 200 to 800. Two subscores from 20 to 99 ranking your grasp of experimental psychology and social psychology will also be given. (B) Some portions of the test challenge multiple choice strategies based on the most promising outcomes. An example of an example is the pokedex basketball quiz question on how to improve a bid in pokemon platinum. (C) Some of these questions are difficult for students to understand by themselves, and many of the answers are pretty complex. If you're having trouble with the test, you can skip this step. (D) The questions are divided into groups of multiple choices. Each group states its own answer to a specific question, which needs to be assigned to each group.

Ex Output:
A

Ex Input:
[header] How to get a merchant account on paypal [title] Visit the paypal sign up page. [title] Select your country or region and language using the drop down menus. [title] Select your account type. <sep> (A) [step] You should see a list of things like payment status, payment schedule, method of payment, service of choice, button number and specific customer verification amount. Select a selected and appropriate payment date from the drop down menu. (B) [title] Use the drop down menus to select account name, account type, and billing options. [title] Ensure that you have sufficient credit card or debit card balances. (C) [step] To get a merchant account, click the " get started " button underneath the " business " option. [title] Select the payment solution you are using with your paypal merchant account. (D) [step] Customers may choose your preferred country or region to be in charge of all of their transactions. [title] Select a payment method based on your selected country or region.

Ex Output:
C