What coversheet is attached to help protect a secret document?

Can someone work out the answer as it comes up in one of my computer science exams and i don't understand the cryptovariables

After making a powerpoint presentation about a new line of clothing designs, henri notices that he used the word “gorgeous” on nearly every slide. what would be the  best  way to add more variety to his wording by using tools within powerpoint? using the thesaurus under the view tab, and then using the find dialog box to find and replace every instance of “gorgeous”using the spelling checker under the view tab, and then using the find dialog box to find every instance of “gorgeous” and change some of themusing the thesaurus under the review tab, and then using the find dialog box to find every instance of “gorgeous” and change some of themusing the spelling checker under the review tab, and then using the find dialog box to find and replace every instance of “gorgeous”

Which email writing etiquette should ariel follow to let people know that she received their message? a. reply to their messages immediately b. use formal language c. specify the email's intent in the subject field d. be direct when writing the reply