instruction:
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". 
question:
[header] How to start using the pinnacle video transfer device [title] Examine the product, so, we have the rca inputs, which is s-video, composite video, and audio. [step] This is the analog in. The digital out has the usb2.com, and the power supply. <sep> (A) [title] Update the firmware of the video transfer. [step] To do this, download the latest firmware on a flash stick, plug the flash stick into the unpowered video transfer. (B) The power supply, also called this vtv plug-in, only has these types of input. [title] Find the vtv pedal, and go to start. (C) The processor is capable of using thousands of media. [title] At this to do that, go to the system tab and change the ios ip address (ios system). (D) It has no access to itunes fans, which is why it is difficult to network. Here's how to use the gadget.
answer:
A


question:
[header] How to unblock a toilet when you have no plunger [title] Cover the end of a mop with a plastic bag. [step] Pull the bag over the end of the mop. Then, tie it off or secure it in place with a rubber band. <sep> (A) You can also use a rag or a toilet cloth to help secure the bag if you don't have a mop. [substeps] Try using empty containers to provide more protection. (B) After securing the handle of the mop, throw it away. [title] Turn on the water faucet. (C) [substeps] Discard any waste that falls from the end of the mop. [title] Use the bucket or bowl to catch any urine that spills out. (D) [title] Plunge your toilet with the mop. [step] Use a forceful in and out motion like you would with a normal plunger.
answer:
D


question:
[header] How to be the type of nerd that girls love [title] Show your smarts. [step] Intelligence is a highly attractive trait. Don't be afraid to show a girl that you are smart. <sep> (A) Also, being smart means you can push her buttons and not get frustrated as a result. When she wants to talk to you change the topic to something more you have in common. (B) They want to be able to have an intelligent conversation with a guy, rather than only discussing sports or pop culture. You just might be able to teach her something or show her a new perspective. (C) If there is a girl you know who just got a great haircut. This will inspire her to be drawn to you. (D) Show her how you know your stuff so she doesn't feel as if you don't get it. [substeps] Make sure your smart supplies are suitable for the occasion.
answer:

B