The right answer is A<span>.Active cell </span>
The problem domain layer addresses how the software will execute on specific computers and networks.
A problem domain is a software engineering term that refers to all information that defines a problem and compels the solution.
A problem domain basically looks at only the area you are interested in and excludes the rest. It includes the goals the problem owner wishes to have and the context in which the problem exists. For example, if you are creating a website for selling artwork online, the problem domain will be artwork and eCommerce.
Therefore, in order to identify a problem domain, you need to know the relevant user requirements. This can be easy when you start by finding out what people (users) think the problem is.
#SPJ4
In optical storage the data is encoded on the disk in the form of tiny pits that are arranged in the concentric rings.
so the answer should be
Optical storage devices focus a tiny pits in concentric tracks on a disk surface that acts as the storage medium.
I Hope it will help you.
Answer: A, it's the most professional way or C but I'd choose A
