I think it's C or B. Not really sure.
Answer:
The Correct Software
Explanation:
Some mail application have built in support to view the attachment like in a phone. While others don't, so if that is the case your device will attempt to open the file according to its extension (.exe, .txt, .js etc.) If your device doesn't have the correct software to open it, then the other things don't matter.
Answer:
Read-Write memory (RWM).
Explanation:
RWM is a type of memory in a computer that can easily be written to and be read from. Unlike the Read Only Memory (ROM) which cannot be modified after it is written, RWM helps users continually update the data. It comes in all forms of physical setup and makes devices more valuable and adds functionality to emerging technologies.