From businesses intensify pitch for 'savviest generation ever' by dave carpenter © 2012 the associated press teenage research unlimited, a market research firm in northbrook, ill., projects that the 31.6 million americans from ages 12-19 will spend $108 billion of their own money in 2000, along with $47 billion of their family's funds. they also account for a disproportionately large share of consumer spending. households with one or more teen-agers spend $10,000 more per year than those without any. and with parents working more than ever before, teens have assumed greater influence in household decision-making. what is the central idea of this passage? a) market research firms are interested in what teen-angers have to say. b) in families with working parents, teen-angers affect decision-making. c) teen-angers account for billions of dollars of consumer spending every year. d) households with teen-angers spend more than those without any teen-angers.