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". 

Q: [header] How to address guests on escort cards [title] Address individual guests using their full name. [step] Guests who are planning on showing up by themselves need only be identified by their first and last name. Consider including the person's middle initial if they have a common name that may be shared with other guests. <sep> (A) [substeps] Consider the sender of each card or the recipient's first and last name. If they have a primary or joint name, include this with the full name. (B) [substeps] It's a good idea to use the name of the guest you want to address yourself. For example, if you want a library card (and you have permission to use the card), you can designate it " mr. (C) [substeps] For example, someone who lives alone may want to include " treasurer jones, " especially if their name is john smith. [title] Use text messages to identify guests based on their name. (D) [substeps] Unless your wedding is going to be an informal celebration, don't use abbreviations or nicknames-write " samantha " instead of " sam " and " william " rather than " bill. " an escort card for an unaccompanied guest might simply read: " john b.

A: D
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Q: [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.

A: B
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Q: [header] How to curl hair [title] Heat up the curling iron. [step] Most curling irons will need about 1-5 minutes to heat up before you can use them. If you try to curl your hair with the iron before it reaches the correct temperature, the curls will not hold. <sep> (A) [substeps] It's important to try to use a medium-to high heat setting, or else you may electrocute your curls. If you do not have the help of a manual curling iron, you can use another curling tool, such as a hair straightener, to find the proper heat temperature. (B) [substeps] Some curling irons will have different settings which you can play around with until you achieve the best result. Try to keep it at the lowest temperature possible though, to cause less damage to your hair. (C) [substeps] Check your curling iron's temperature even if it says to " about 1, " then you'll need to make a quick check-up before if you want to squeeze out all of the curls. [title] Scrunch your hair into a loose spiral. (D) Think about this: the curling iron will hold hair in place for a little longer if you use it very little. If you have thick hair, use 1-2 minutes of heat.

A:
B
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