A ____ attaches itself to a program or data file so that it can spread from one computer to another, infecting as it travels.

Which attribute defines the number of times a background image displays?

A) loop B) repeat C) continue D) redisplay

If you want the individual objects in a group to animate separately, you have to ____.

A. ungroup them B. unlink them C. delete and save them in separate files D. use an add-in program