Why did demographers stop placing empasis on the decline in mortality as the cause of low birth rates? what other alternative model was suggested?

Read the following excerpt from "harrison bergeron" by kurt vonnegut: he tried to think a little about the ballerinas. they weren't really very good-no better than anybody else would have been, anyway. they were burdened with sashweights and bags of birdshot, and their faces were masked, so that no one, seeing a free and graceful gesture or a pretty face, would feel like something the cat drug in. george was toying with the vague notion that maybe dancers shouldn't be handicapped. but he didn't get very far with it before another noise in his ear radio scattered his thoughts. what message about the role of media is best supported in this excerpt? a. media are the reason george is able to watch ballet. b. media change people's values, making them more selfish. c. media tend to make audiences' worldviews the same. d. media can be used to distract audiences from the truth.