Which statement best describes crystallized intelligence in adulthood?

Which statement best describes crystallized intelligence in adulthood?

• A. Fluid intelligence refers to the ability to solve novel problems and tends to decline with age.
• B. Crystallized intelligence is accumulated knowledge; tends to stay stable or improve with age.
• C. Fluid intelligence declines only in early childhood.
• D. Crystallized intelligence declines rapidly after middle age.

Answer: (B)