What function does the Quick Command of F4 do? copies the text for pasting

repeats the last action

saves the document

pastes copied text

In a file-oriented information system, a work file stores relatively permanent data about an entity is created and saved for backup and recovery purposes stores records that contain day-to-day business and operational data is a temporary file created by an information system for a single task

Awell-diversified portfolio needs about 20-25 stocks from different categories.

In which part of a professional email should you try to be brief, but highly descriptive?