input: Text: Vulgar Keynesians Economics, like all intellectual enterprises, is subject to the law of diminishing disciples. A great innovator is entitled to some poetic license. If his ideas are at first somewhat rough, if he exaggerates the discontinuity between his vision and what came before, no matter: Polish and perspective can come in due course. But inevitably there are those who follow the letter of the innovator's ideas but misunderstand their spirit, who are more dogmatic in their radicalism than the orthodox were in their orthodoxy. And as ideas spread, they become increasingly simplistic--until what eventually becomes part of the public consciousness, part of what "everyone knows," is no more than a crude caricature of the original. Such has been the fate of Keynesian economics. John Maynard Keynes himself was a magnificently subtle and innovative thinker. Yet one of his unfortunate if unintentional legacies was a style of thought--call it vulgar Keynesianism--that confuses and befogs economic debate to this day. Before the 1936 publication of Keynes' The General Theory of Employment, Interest, and Money, economists had developed a rich and insightful theory of microeconomics, of the behavior of individual markets and the allocation of resources among them. But macroeconomics --the study of economy-wide events like inflation and deflation, booms and slumps--was in a state of arrested development that left it utterly incapable of making sense of the Great Depression. So-called "classical" macroeconomics asserted that the economy had a long-run tendency to return to full employment, and focused only on that long run. Its two main tenets were the quantity theory of money--the assertion that the overall level of prices was proportional to the quantity of money in circulation--and the "loanable funds" theory of interest, which asserted that interest rates would rise or fall
  Question: Why does the author tell a story about his vehicle?
  
   (A) To talk about how fast he drives
   (B) To make a point about what has the most impact on the economy
   (C) To talk about safe driving speeds
   (D) To make a point about how many different things impact the unemployment rate
  Answer:
output: To make a point about what has the most impact on the economy