Which of the following is not a characteristic of a least-developed economy? A. most workers are in the tertiary sector B. a very low GDP per capita C. a lack of basic resources D. a high level of poverty Please select the best answer from the choices provided

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