One of the things that are a challenge, is that you have to get the correct puntuation, correct capitilization, because it's a buisness email. You ont want to mess a buisness email up. You also have to have no repating phrases and sentences. You can't be adding random words and saying "and" all the time.
Answer: I think a
Explanation: sorry I’m in wrong, have a great day!! :D
The purpose of the operating systems is to provide an interface between the user and hardware. It's mange all resources, for example; memory, processors, and disk space. It's also mange how to file and store data in a computer system.