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".

Example Input: [header] How to choose a parenting style [title] Know the 4 styles of parenting. [step] Although there are many ways to be a parent, psychologists often refer to 4 main parenting styles. The styles are authoritarian, permissive, authoritative, and uninvolved. <sep> (A) Take some time to learn about each the positive and negative qualities of each style so you can figure out which style will benefit your family the most. It's important to consider your specific child's temperament and tailor your parenting style to suit their needs, incorporating as many authoritative aspects as possible. (B) [substeps] Authoritative parenting styles tend to focus on being a superior leader and supporting all children. Non-authoritarian parenting styles also require that you always become a one-on-one parent. (C) The styles focuses on incorporating strong communication, discipline, family beliefs, and rule-breaking into the decision making process. [substeps] Discipline refers to your work ethic, ability to follow through and do what you are told, and qualities you and your children are capable of developing in your own life. (D) [substeps] Authoritative means to act in the best and most mature ways, while authoritative means to assert authority (i.e., assertiveness when something goes wrong). Authoritative encompasses one's own way of taking and retaining power and the needs of others.
Example Output: A

Example Input: [header] How to install custom firmware [title] Record the router's model and version number. [step] These numbers are usually located near the manufacturer's logo, underneath or in back of the router. Write down the model and version information for future use. <sep> (A) [substeps] If you are using windows xp (default operating system), the model number can be found in the start menu under " system settings. " skip all the discussion menus, and then go to system preferences. (B) [title] Obtain the router's ip address and default gateway for your computer system. [substeps] Determine the ip address and default gateway for a pc. (C) [substeps] " w " with the green background is the serial number for the model. " p " with the red background means " unhappy operating system. (D) [substeps] It is easy to determine what operating system is running on your router if you don't know the model. Copy the model from the registry to convert it to your operating system.
Example Output: B

Example Input: [header] How to estimate your uber fare [title] Tap the uber app. [step] Log in if you aren't logged in automatically. [title] Tap " where to? " [title] Enter your destination. <sep> (A) [title] Tap the " current location " button. [title] Drag the pin to your desired pickup location. (B) [step] Use the app's official search field to search for a fare. It doesn't matter what your destination is--there are four transit options: taxi, express, money, and subway. (C) [step] Before you can estimate your fare, you'll need to know exactly where you're going ,. Tap on the " save now " button to save your information. (D) [step] Tapping the " where to is " field will display a list of near-and-distant destinations. You can also browse by subdestinations from your driver preferences.
Example Output:
A