Which of the Following Statements Is True Regarding Crystallized Intelligence

Multiple Choice

Which of the following statements is true regarding crystallized intelligence and fluid intelligence?

A) Crystallized intelligence increases across age, while fluid intelligence begins to decline around age 30.
B) Both remain relatively stable across the life span.
C) Both begin to decline around age 30, with crystallized intelligence showing the bigger losses.
D) Both remain stable until about age 60 and then decline dramatically.