Only One of the Following Statements Is True About Stage

Only one of the following statements is true about stage theories. Which one?

A) As children make the transition from one developmental stage to the next, they are apt to display characteristics of both stages for a short period.
B) The order in which children progress through various stages of development differs from one child to the next.
C) Stage theories largely describe physical development, rather than cognitive or social-emotional development.
D) Increasingly, developmentalists are realizing that development is characterized by discrete stages rather than by gradual trends.