PLEASE HELP!!! what was the main purpose of the national government formed by the Articles of Confederation? A) to run state and national elections

B) to manage trade between the states

C) to build roads and bridges in the states

D) to manage the war with Britain for the states

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