Athird-level heading of a memo is typically a. placed at the left margin of the memo. b. a subheading of the fourth-level heading. c. never followed by text. d. typed in all capital letters.

Which of the following accounts for someone who has had regular herpesvirus-mediated cold sore or genital sore flare-ups? a) re-infection by a closely related herpesvirus of a different strainb) re-infection by the same herpesvirus strainc) copies of the herpesvirus genome permanently maintained in host nucleid) copies of the herpesvirus genome permanently maintained in host cell cytoplasm