Alicia is an engineer in a plant that designs military tanks, and she enjoys her work immensely. Because she is so effective at what she does, she completes her assignments in about half of the time that her supervisor allows, which leaves her bored and frustrated during much of the work week. According to Albrecht's research on stress in the workplace, which variable is not in Alicia's comfort zone

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