Bob has an unknown liquid and must determine what it is.He decides to systematically use a number of tests to determine what it is.What stage of cognitive development has Bob reached?
A) sensorimotor
B) preoperational
C) concrete operational
D) formal operational

Question

Quizplus · Accepted Answer

Bob's use of systematic testing to determine the identity of the unknown liquid suggests that he has reached the formal operational stage of cognitive development. This stage involves abstract thinking and use of logical reasoning to solve problems.

Bob Has an Unknown Liquid and Must Determine What It