Despite the Disagreements Among Theorists About the Existence of a Fifth

Despite the disagreements among theorists about the existence of a fifth stage of cognitive development,nearly all agree that

A) solving real-life problems is easier if a person uses formal operational thinking skills.
B) thinking about adult real-life problems tends to become increasingly relativistic.
C) as people enter adulthood,they apply concrete operational skills to the concrete problems of daily life.
D) memory ability declines as people enter the fifth stage.