The book industry was slow to develop after the revolutionary war. books were still expensive, and literacy remained a luxury. but in a movement that began before the civil war, came to most states by 1900, swelling the number of readers. a. compulsory education b. reduced taxes on the purchase of books c. the railroads d. the automobile

What was piaget's explanation as to why preschool-age children in the preoperational stage make errors on tasks requiring conservation? a) preschool children's tendency toward centration prevents them from focusing on other relevant features of a situation b) preschool children have not yet developed numerical understanding; therefore, different amounts are meaningless c) preschool children's neural-visual network is not fully matured d) preschool children have not lived long enough and accrued enough experience to know the difference between quantities