Viruses embed themselves into the code of software; they are harmless until?

Which of the choices sean are not true when considering virus behavior

In microsoft word, when you highlight existing text you want to replace, you're in              a.  advanced mode.    b.  automatic mode.    c.  basic mode.    d.  typeover mode

The keyboard usually has six rows of keys. which of the following is not one of the key group categories? letter keys number keys control keys graphic keys