Which term is used by Coombs to reference a sudden, large-scale event that seriously disrupts routines of systems and poses a danger to values and social goals?

What are the two most common organizational patterns for persuasive speeches?

What will be an ideal response?

When a close friend she hasn't seen in a long time visits Beth in her dormitory room, Beth closes the door to the hallway, turns off the radio and shuts the window. By doing so Beth is reducing the potential __________ so she can effectively listen to her friend. [p. 119, III]

a. environmental distractions b. internal obstacles c. insular obstacles d. regulative distractions e. message impediments