You are usually editing a word document when you are finished typing up and assignment or what not, then highlighting what you want to edit will tell the computer/word document what and where your making your edits.
The best answer to the question that is being presented above would be letter d. One of the biggest risks involved in using electronic mail or e-mail is the amount of junk mail you get from unsolicited, spamming, and phishing e-mail addresses.