Argumentation can be characterized as being

According to the social movement model, all of the following are unique characteristics of social movements except:

a. social movements either promote or oppose social change b. social movements are limited in scope both historically and geographically c. social movements are not institutionalized or recognized by those in power d. social movements encounter opposition from those in power

Headphones for professional purposes should be:

a. open-air. b. circumaural. c. supra-aural. d. uncomfortable.