Answer:
Option A is the correct answer for the above question.
Explanation:
The keyboard is a device, by which a human can instruct the computer in the text form. There are so many keyboards in which, thumb keyboard is one of them. The thumb keyboard is found in mobile phones, smartphones or PDA phones, which is used for personal use. It is a designed layout of the keyboard that can be placed on the hand of the human and a person can type on its with the help of his thumb.
The above question asked about the type of the keyboard which is used in various smartphones and other phones. That keyboard is thumb keyboard which is described above and it is stated from the option A. So option A is the correct answer while the other is not because--
- Option B states about the traditional keyboard which is used for the PC only.
- Option C states about the Notebook keyboard which is used for the Notebook computers only.
- Option D states about combination which is not a type of keyboard.
 
        
             
        
        
        
"My 2 in 1 laptop/tablet  goes black and does this weird glitching thing..."
2-in-1 has a bunch of connections bet the keyboard n screen. its weaker than a laptop cuz' the keyboard is detachable. bad news if u have a flaky connection there.
if its brand new or under warranty, i wuld send it back. good luck!
 
        
             
        
        
        
Interntors present an interesting kind of people who think in peculiar ways sometimes. This ability allows them to view certain situations in ways in which other people cannot. Because of this, they can think of new ways of how such situations can be tackled. This is how inventions are born. A person with an inventive mind sees a new situation where he thinks of a new solution how he could improve this situation with his invention.
This process is continued continuously with new generations of inventors seeing and coming back to old situations over and over again, inventing new things along the way. 
        
             
        
        
        
You could download it to another device, and send the music to the laptop. That, or you can plug it into the USB port.
I hope this helps!