Literary and economic people have a very keen sense of smell, and their desire to discover good things is endless. They know the dynamics of the literary world, and their main job every day is to figure out what kind of works are selling well. To this end, they track all large newspapers With literary magazines, read tons of review articles, and personally interact with writers, editors, and other people in the publishing industry, get a variety of inside news this way. What does this passage mainly support? ['Literary economists are the link between publishers and writers.', 'Speculative nature of work performed by literary and economic men.', 'The emergence of literary economics poses a threat to publishers.', 'Literary and economic people have a sensitive and fast social network.']