As Libby entered the library, her friend saw her and raised her finger perpendicular to her lips to indicate to Libby that she needed to remain quiet. What function was this behavior serving?

Discuss a strategy for "having a backup plan" when you plan to use a slide-deck program. What does a "backup plan" imply, and how would you enact one? 

What will be an ideal response?

Mahalia is a pop star with a large Twitter following. While she knows her fans like reading what she posts, she can’t be certain that everyone will enjoy her posts or not be offended by them because she doesn’t know them personally. This lack of knowledge on Mahalia’s part is an example ofthe phenomenon known as _____.

a. collapsing contexts
b. social presence
c. media richness
d. spreadability