In one study, piaget showed children a row of cups and asked them to place an egg in each. afterward, piaget spread the eggs out in a long line that extended beyond the row of cups. children who were in the stage of cognitive development incorrectly claimed that there were more eggs than cups because the row of eggs was longer than the row of cups. a) sensorimotor
b) preoperational
c) formal operational
d) concrete operational

B). Pre-operational

Explanation:

Cognitive development demonstrates one of the crucial development processes that include the development of knowledge, skills, dispositions, and problem-solving that assists a child to perceive and understand the world around them. The pre-operational stage refers to the second stage of cognitive development begins at the age of two and lasts until the age of seven in which the child thinks symbolically and yet to develop logic. Through the given example, Piaget describes the 'pre-operational' stage as the children are not thinking logically but rather symbolically. Thus, option B is the answer.