In a course on mass media history, the professor shows the film “empire of the air: the men who made radio,” which describes the entire development of radio to three men: david sarnoff, lee deforest, and edwin armstrong, ignoring the contributions of women and minorities to the development of the medium. this is an example of what?

Ibelieve b) recall election

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography. 

It would be answer a