Which of the following viruses infects Word 97 documents and the NORMAL.DOT file of Word 97 and Word 2000?

I LOVE YOU was a VBScript-based worm spread as an email attachment that overwrote files, not a Word macro virus targeting NORMAL.DOT.

Melissa, discovered in March 1999, was a macro virus that infected the NORMAL.DOT global template in Word 97 and Word 2000, causing every new document created to carry the infection. It also propagated by using Microsoft Outlook to mass-mail itself to the first 50 contacts in the victim's address book, overwhelming mail servers worldwide.

Klez was an email worm that exploited vulnerabilities in Outlook and Internet Explorer, not a macro virus infecting Word document templates.

Boot sector viruses infect the master boot record or volume boot record of storage media, not Microsoft Word document templates.